Car Ac Compressor Running When Ac Is Off

If the condenser coils are dirty, they won’t be able to dissipate the heat as effectively. I turn the unit off and the fan shuts off but it sounds like the compressor is still running. I have a 2002 nissan altima, the car runs good but I notice that when I turn on my air conditioner and I come to a stop sign the car turns off. If the current temp shows greater than the set temp (or it doesn't show the current temp), but you feel like the AC is running too long, it may be that the AC needs to cool off the whole house, especially the area around the thermostat. In my truck, choosing max or norm AC, or defrost, turns the compressor on. Have questions? Ask the pro. When the AC doesn't need the compressor to run, an ICE has a solenoid that disengages the clutch, so that part has nothing to do with it. I thought they were supposed to cycle on and off. You will notice that with the car running and the AC off, the pulley ran by the belt will be spinning but the front hub will be stationary. Air conditioning (often referred to as AC, A/C, or air con) is the process of removing heat and moisture from the interior of an occupied space to improve the comfort of occupants. One of their more popular successes was the design of the model A-6 compressor, which was used by General Motors for more than 25 years. He says the high pressure is building up because the condenser fan is not running at full speed and that it would need to be replaced. When power is applied to it by the AC system relay- it is supposed to energize, extent the plunger and bump up the idle. Inside it is not getting cold. The ISC has been known to cause engine stalling when additional energy loads, such as the turning on of power steering in addition to the turning on of air conditioning, are brought to bear. It is responsible for pressurizing the AC system and keeping the. I hooked them up, cranked the AC on and found that both the high and low pressure side were reading about 130 psi. Having your car's air conditioning go out suddenly can ruin your day fast. Worked great yesterday. Loud or unusual noises within the compressor may be a sign of trouble and should be tended to by a professional as soon as possible. The three components of a car's air conditioning compressor clutch When power energizes the clutch coil, the magnetic field pulls the clutch in towards the pulley. In many standard residential AC systems, a compressor is often placed in the outdoor area. See a textbook example with this video about rip-off car ac repair. To diagnose why the air conditioning in your car isn't working, start by turning your car on and setting the AC to full blast. Compressor is running, but not pumping freon thru sight glass. Due to this, you lose visibility of the road ahead, and put everyone’s life. Except on modern cars,the RPM will be adjusted to normal by ECU. I've never been in a car (even deisel pick-ups) that felt the same AC temp in the city vs. If you notice that your temperature gauge is climbing, turn the AC off and open your windows. I get the low freon and a/c compressor shut down message when I try to kick on the cold. Air conditioner starts then stops after only a few seconds Then it does it again What could be wrong? ( you should see ice accumulation on very big line going back to unit if freeze up exist. If the car is running the noise is not as noticable due to the engine noise, but when the car is turned off, the compressor makes a loud noise as the internal part of the clutch and compressor continue to turn momentarily. This Freon is a gas and liquid combination that is compressed and circulated throughout the air conditioning system. iii) Compressor Bypass - you my want to bypass the compressor if you need to drive the car while performing the job (e. If the outside unit stops working, but the inside unit is still running, with the blower fan operating, you're still out of luck. Although there are lots of other problems that can cause poor cooling the two mentioned above are ones that I find often. I figured out it was probably the relay sticking, so I replaced it on the control board inside the unit inside and it seems to work fine now. This time we get to share some good news. Frozen evaporator coil. I can easily turn the car back on but as long as the air conditioner is on it keeps doing the same thing. The first item to check would be the alternator. So my car is at a DMC vendor getting worked on. If you unplug the clutch, it should release. A power-up is when AC voltage goes from 0 to on. Chirp Coming From By The AC Compressor Okay, so I have been getting a chirping sound from my engine bay, but only when I have the heater/fan/AC on. Probably your fan belt is a bit slack. Your air conditioner has to be absolutely air tight. The fan will not shut off even when the thermostat 3-way switch (Cool-Off-Heat) controller is in the OFF position. These coils hold the refrigerant sent in by the compressor, chilled and ready to cool your home. The AC’s compressor is run off the engine, and the extra load could be what’s causing it to run hotter. Well, the short answer is that your car’s air conditioner might start blowing out hot air. The compressor isn't always on, and needs to turn on and off in order to keep your car's cabin at the temperature you set it to. Say in a 5 minute period it will switch on and off automatically 10 times and I can hear the Click Sound of AC Turning off and ON again. When the temperature needle on my instrument panel gets above halfway (up to halfway is probably normal operating termperature) then the the AC compressor. The pulley spins any time the engine is running. Gently rinse it so the water cleans between the thin metal fins on the condenser. It is common for the pressure to drop too low to keep the pressure switch turned off or the low temp sensor to trip the code back on and lock out the compressor again. When the car was moving the AC stayed on apparently because the alternator was supplying a greater power source. If you switched the unit off while the home ac compressor was running: Wait at least five minutes before switching it back on. Compressor is running, but not pumping freon thru sight glass. Why? This can be caused by a few different things. The compressor itself doesn't work. That checks the low speed circuit. I think so this pully controles this requirement. A compressor is used for many things, so why not run air lines to the equipment right now, or at least "Tee" the lines from the dryer for eventual installation? We used galvanized pipe to run a separate line over to the blast cabinet, utilizing an in-line shutoff valve for those times we don't want air running there. These parts provide a quick jolt of power which starts the compressor and runs it as well. The Air conditioning is constantly running. How often should an AC compressor engage and disengage? At idle, mine will run, disengage for about 3 seconds, then engage again. Kenmore 15,000 BTU window unit model # 7515 1500. A few common causes of this problem include: Improper Refrigerant Charge – If there’s too much or too little refrigerant in the system, the compressor may shut off randomly and prematurely. Service Champions is the Northern California air conditioning company for homeowners who want industry leading technicians and a 100% money-back guarantee. It is common for the pressure to drop too low to keep the pressure switch turned off or the low temp sensor to trip the code back on and lock out the compressor again. If you keep driving but shut off the AC for a while then turn it back on does it work briefly again? Once it stops working leave the AC running and check the high and low pressure lines under the hood and see if the smaller line is very warm and the larger diameter line is very cold. Since car air conditioning systems get turned on and off constantly, this power fluctuation puts a lot of stress on the compressor. The compressor is running and the pressure will go high when the cooling quits at low speed. OK, so the air con system says: ‘The cabin temp is getting too high: run the compressor. I first checked all of the fuses and all of them were fine. This charge is done with the engine off and the compressor NOT running. The pressure will drop once it starts and it will start to cycle on and off. I have to pull fuses to turn it all off but then I don't have any AC obviously. Same reading with AC on or off with car running as well as when car and AC are off. We noticed that our outside ac unit runs (the fan) even though the thermostat control is set to "off" inside the house. If you switched the unit off while the home ac compressor was running: Wait at least five minutes before switching it back on. The power requirement of an air-conditioner is enormous. The compressor itself doesn't work. Checked the fuse and it is good. So I bought a recharge can of the r-134 I believe it is called and now the compressor will turn on for a second, make a sound like a drum is beating three times, and shuts off. The air conditioning compressor is one of those parts that typically gets a lot of usage and provides that critical cool air on hot summer days. Car makers use an electro-magnetic clutch to engage and disengage the air conditioning compressor. When the belt is worn, stretched or cracked it can slip or break, stopping the compressor and shutting down the A/C. The fan and all other funtions operate properly from the thermostat. The three components of a car's air conditioning compressor clutch When power energizes the clutch coil, the magnetic field pulls the clutch in towards the pulley. I recall my 97 Taurus A/C ran in all modes except off, and vent mode. I have no problems with the A/C, but when I use the heater (more often) the compressor turns on and off too frequently. Unless you're leaking a fluid other than H20 that is not clear do not worry unless you hear funny noises. Their title is a bit misleading – they are NOT running their A/C entirely off solar (which this article is addressing). But if a motor runs hot for too long, the wire insulation can break down, leading to an electrical "short. Kenmore 15,000 BTU window unit model # 7515 1500. I made a video showing how to run an AC performance test. Automotive Air Conditioning Systems. Although it may be alarming the first time it happens at a stoplight or when you are idling at the store, it is very normal. In most cases, especially in homes, you should not run an air conditioner at 58 degrees F or lower. But i wonder whats the relationship with the engine lagging?Does the compressor drains a lot of current from the battery?. Turning the car or then entire climate system off and on does not disengage it. I tried to locate the fuse for the AC, but when I pull the fuse out, 25 amp, the AC and fan blower continues to run, and the dash board. What could cause this issue?. If your air conditioner shuts off long before your home is cool and comfortable, there's probably something wrong with the compressor. This is often caused by loose mounting bolts that secure individual air-conditioning components. If your compressor is still under warranty, replace only the compressor. Checked refrigerant level and that is normal. As its name suggests, the main function of a compressor is definitely compression. If I place it in the Cool position the air conditoner compressor kicks in and it cools my 5th wheel but doesnt shut off. The compressor will have two metal tubes coming out of the back or side/top of unit. I have absolutely no idea what the problem could be. Electrical air conditioner issues. The compressor in the air conditioner is turned on and remains on until the room temperature decreases to be the same as the temperature of the thermostat. If your AC won't turn off, you might not notice the irony of the situation right away. If your car is not used often and/or is stored for much of its life, simply start the car and run your air conditioning (with the compressor engaged) for approximately 30 seconds. This is because if you have too much coolant in the system, then the compressor will have to work extra hard to move this coolant. Today I hooked it up for pressure readings. It should not have power when the car is turned on unless the AC is also turned on. Remove the AC compressor's front and rear bolts only. Open the hood and sure enough compressor is spinning. Many cars use the A/C compressor for functions of heating and ventilation in the defrost cycle, too. I just had the AC compressor replaced bout 2 weeks ago. if they do then you have a good charge. The other day I purchased an AC manifold gauge set. In this condition, the compressor may cut out on low pressure cutoff depending on the actual remaining pressure. Problems, however, often do not lie within the compressor but in another part of the HVAC system. Follow the recommendations in the owners manual for operating the AC. Besides, a severely broken air conditioner, like a severely injured ankle, isn't something you can ignore, especially if recognizing any of these signs and symptoms means you can find a fix before total failure sets in. Say in a 5 minute period it will switch on and off automatically 10 times and I can hear the Click Sound of AC Turning off and ON again. If it's not, you may need to fix the cooling fans on your radiator or replace the cabin air filter. The noise goes away when I turn the AC ON. The compressor also has an electrically-operated clutch that turns the compressor on and off as you demand more or less cool air. Bear in mind, most modern cars will run the AC to dry the air in defrost mode, even if you've got the AC turned off. Since we are asked this question so often though, we do have a few good answers ready to go. The clutch engaged and it started taking 134a. It could be a serious problem in the summer. System warm by engine small tank is also the heater in warm water and into the wind and heat exchange, blow out hot air. Electric AC has another advantage. Of all the problems that can plague your AC, compressor overheating can be one of the more dangerous ones. I am trying to figure out why they would both be the same. The compressor can only work so hard though, and when it reaches the maximum it can work, it will kick off. If your AC compressor is not running, the refrigeration cycle will not happen, and your refrigerant will be unable to reach the parts of the system responsible for cooling your vehicle. Still have AC problems? Ask our techs in. If your air conditioner shuts off long before your home is cool and comfortable, there’s probably something wrong with the compressor. Unfortunately, frozen AC lines can put a major kink in your road trip. If your air conditioner shuts off long before your home is cool and comfortable, there's probably something wrong with the compressor. Have someone sit in the car and turn on the AC while you're under the hood watching the AC compressor. Air Conditioning Compressor. Here’s the simple way to figure out whether A/C Pro will work in your car’s air conditioner, or whether you need to take it to a mechanic instead. 1993 Honda Civix Dx coupe. I'll turn off the AC for about 30 min. the same issue with mine the fan inside does not turn off when I turn the AC off at Thermostat or when the desired Temp is reached. If you have a situation where your car's air conditioner compressor clutch doesn't engage, try the troubleshooting techniques described here. I know it is running off an electric motor and I expect that to make some noise, but this seems excessive. Undersized air conditioner. This condition will only damage the compressor of the unit continues to operate for extended periods of time. Why is my car air conditioner not blowing cold air. Sometimes they are combined into a single physical switch. I installed a new Denso compressor, Denso receiver dryer, new (non oem) expansion valve. Motor running, AC on max, fan on high. If you notice your AC is running, but not always cooling, you might want to check your thermostat settings. Turn the AC back on at the thermostat. One of the best indicators of a Corvette Air Conditioning compressor failure is noise. When you run the compressor, the low side will get drawn down to a lower pressure and the high side will go up. She does run the air conditioner a lot, but 68K seemed to be very early for a problem to arise so I read through a bunch of threads on various forums. This Freon is a gas and liquid combination that is compressed and circulated throughout the air conditioning system. Most vehicles today have one multi-speed fan that blows air through a series of ducts and vents based on the driver's selection in their climate control system. I listened to the noise with a mechanics stethoscope and determined that the noise was either coming from the air conditioning compressor pulley bearing or the belt tensioner. Some automobiles provide a lot of insulation in the engine compartment. Sound like a compressor to you? 2002 Audi TT Quattro roadster, white, baseball glove seats, 18" aftermarket rims, Pioneer HU with Rockford Fosgate/MB Quart speakers. This is because "cold" gets stored in what is called the evaporator and it takes some time to transfer this to the air. Your best move is to shut the air conditioning off immediately until the compressor can be replaced, even if it is cooling. After some hissing and other noises typical to a compressor starting up, it looks like the compressor disengages after about 30 seconds. So it must be working all the time. HVAC systems are closed-systems, meaning they aren't open to the elements and therefore last a bit longer. I wouldn't leave the belt off any system I wanted to work long term. The only way I » AC Fan Runs Constantly Even if Unit is two air conditioning. Car makers use an electro-magnetic clutch to engage and disengage the air conditioning compressor. When I turn the AC on (GM A6 compressor) the alternator "quits charging". So, just turn off the AC and you're fine. If it's not, you may need to fix the cooling fans on your radiator or replace the cabin air filter. It actually takes the heat and moisture out of the air that is already in your car, leaving behind cooler air. The compressor itself doesn't work. There's probably high pressure building up in your system, causing the compressor to scream. As soon as the car starts the compressor is running until the car is turned off. The AC compressor’s job is to take the refrigerant gases from the evaporator and convert it to a hot and high-pressure gas. Car makers use an electro-magnetic clutch to engage and disengage the air conditioning compressor. And if you want to contribute to your. Probably my lack of precision but I should have asked “why does the compressor keep running after I turn OFF the defrost-setting” … I can accept that defrost engages compressor, removes humidity, lubricates pressure-seal, etc but compressor continues even after switching the vent / AC settings to “normal”. How to get car's A/C blowing cold again. Well, the short answer is that your car’s air conditioner might start blowing out hot air. This is also called the outer unit of AC system. But if temp at a stop is really bad and running is almost kind of cool, there could be a leak and it's low on freon. When your compressor is off, pressure rises and triggers it to restart again, creating a rapid on/off cycle that can cause serious system damage or possible failure. In February 2016, our friend’s Nikki & Jason put out a video called Off Grid Solar Powered RV Air Conditioning. Again, most common reason for an A/C compressor not engaging is a lack of refrigerant (check that first). The compressor is what helps to remove the heat. ) With the air conditioner servicing running, make sure it’s actually working by touching the coolant tubes (Photo 6). After that you're gonna need a schematic to accurately trace down the break in the circuit. It also fits with the earlier symptoms of the AC randomly not working before it went out completely. Water has built up under the cooling coils on the indoor unit - some systems collect water and have an automatic shut off for the cooling coils when the sensor is tripped. You don't specifically say, but is the compressor continuing to run while only fan cycles on and off every 5 seconds?. That fan pushes/pulls air across the a/c condenser to help keep the A/C blowing cold air. Assume clogged expansion valve? Car is '91 300SE with all original system. So it is conceivable that on a very sunny, 70-degree day, it could be 85 inside the house (that would be extreme but not beyond the realm of possibility). Also the AC will run if you run defrost, whether the light is on or off, in order to dehumidify the air. It does not use up refrigerant. This signals to the AC to shut off (because the thermostat now think your whole home is cold). It is coming from the A/C Compressor area. Standing pressure actually makes me go back to the expansion valve being bad. The ISC is most probably the cause of your stalling problem when the air conditioner is turned on. Car air conditioner not cold? Without a doubt, it is no fun when you pop on your car's air conditioner only to not feel cold air. When I turn my air conditioner on my car starts jerking and some times even stalls. I have a 2004 F150 Heritage. This is why the AC is short cycling. In cooling mode, the compressor will turn ON when the ambient temperature of the room is higher than the set temperature by 0. The A/C compressor is not electric on the FEH. Now the engine temp on the truck is normal when the fan comes on when running the AC. That fan pushes/pulls air across the a/c condenser to help keep the A/C blowing cold air. does any one know of a air conditioner that could be used in a car, that runs off of the D/C current of a car of using a converter to use A/C power. Replied by quickNpainless on topic Compressor will not cycle OFF well the compressor cycles on when the pressure sensor on the high side of the system sends a signal that the pressure has dropped and the compressor needs to kick on to get the pressure back where it needs to be. I turn the unit off and the fan shuts off but it sounds like the compressor is still running. Now, what if the breaker isn’t tripped? The compressor contactor may be defective and needs replacing. These compressors can be gotten cheap ($20-40) from junk yards and are very powerful, since they run off your engine. I can cruise at 60 MPH on the highway with the air conditioning on and the car won't shake, but once I start to slow down or come to a stop, it will shake a lot. The AC tech discovered my whole house humidifier on the air handler was wired incorrectly to run when the AC or furnace were On. Set the thermostat to a temperature below the room temperature, and then switch it ON. My 1996 camry makes a squealing/whistling noise whenever i turn on the AC. 1 on the high side, 1 on the low side. How to Replace a Broken Air Conditioner Condensate Pump. Get your AC working again with a new compressor. Next step is to determine if the AC compressor is engaging. The High Side Liquid Charging Method involves the use of a refrigerant heater to increase pressure enough to overcome the pressure in the AC system. #1 Pressures with the engine and ac off. We noticed that our outside ac unit runs (the fan) even though the thermostat control is set to "off" inside the house. I know that when i switch ON the AC,the clutch at the compressor works. Checked the fuse and it is good. or turn off the car all together to run an errand and when I return it's cold again. Although there are lots of other problems that can cause poor cooling the two mentioned above are ones that I find often. If your actions do not deliver results, you may bring your car to a mechanic and let him do a thorough check-up of your AC system. I was looking under the hood at the AC compressor at idle. He replaces the fan and drops the car off at my office, saying the problem is solved. Faulty wiring may be to blame, or the motor may again be the culprit. Undersized air conditioner. The only way to stop the compressor is to shut it off at the breaker. That way, the engine runs the AC compressor when the belt engages. In simple terms, an A/C Compressor is a pump. When its level goes lower than the acceptable level, you will face the issue of car air conditioner not blowing cold air when idling. Operation of the system is as follows (assume that the car is not near WOT): If the fan is on, adequate pressure is present in the system (pressure cycling switch is closed), and either a/c or defrost is selected, the point "to ecm" is drawn close to ground. Just like your car, when your AC unit makes a loud, strange sound, it’s wise to call an HVAC professional as soon as possible. This is because "cold" gets stored in what is called the evaporator and it takes some time to transfer this to the air. Compressor turns on and stays on when I turn the A. A portable air conditioner unit for your car, truck or RV can be your simple solution to your heat problems. I can't imagine there being differences based on where the car is built or sold but here is how my Ford products operate: Badgerfan is right. IT IS A BAD PRACTICE IRRESPECTIVE OF THE KIND OR MAKE OF AUTOMOBILE. Also, the compressor doesn't have an internal oil system, it uses the oil suspended in the refrigerant for lubrication. Having said that ,if there is too much refrigerant in the system the cooling efficiency will be reduced same as if there was low refrigerant. Especially if is one of those days where putting down the windows just won’t cut it and help cool it off. Basically as far as I know the AC all of a sudden began blowing warmer air. Listen for the AC Compressor to click in and out and feel the accumulator for cold temperatures. Most vehicles today have one multi-speed fan that blows air through a series of ducts and vents based on the driver's selection in their climate control system. Inside it is not getting cold. Before going to the repair shop, though, you can check to see if the following reasons are causing that unnerving scent. The compressor can only work so hard though, and when it reaches the maximum it can work, it will kick off. I looked at the capacitors and they look good (not bulging). Has a rebuilt compressor purchased 2 years ago. These compressors can be gotten cheap ($20-40) from junk yards and are very powerful, since they run off your engine. If you're about to go to bed and want to avoid nightmares, you might want to put off reading this until morning. OK, so the air con system says: ‘The cabin temp is getting too high: run the compressor. The air conditioner is conveying heat outside, therefore the pipe is really hot. Your air conditioner is an expensive, complicated piece of machinery that requires a trained HVAC specialist to safely inspect and repair the equipment. There is very good chance that it could seize up our the o-rings could develop leaks. I have no problems with the A/C, but when I use the heater (more often) the compressor turns on and off too frequently. the car idles just perfect without AC , once the AC kicks in the idle is really low around 0. If the contactors contacts do not pull in or close (completing the high voltage circuit) voltage will not pass thru to the compressor. Automotive Air Conditioning Systems. The compressor draws several kW. 5 from the 14 volts otherwise. The incident happened within 15 days. I was watching the ac compressor clutch engage/disengage today after replacing my water pump, and I noticed it starts and runs smooth for a few seconds, but then stops, and after about 30 seconds it starts again, runs for 10-15 seconds and stops. The compressor will have two metal tubes coming out of the back or side/top of unit. That's why the magnetic clutch is there. In most car models these days, an air conditioner could not work correctly without an operating compressor. The compressor will typically cycle rapidly on and off. Basically as far as I know the AC all of a sudden began blowing warmer air. Why is my car air conditioner not blowing cold air. The average backyard mechanic can diagnose a compressor in about an hour. When I turn my air conditioner on my car starts jerking and some times even stalls. When the engine is running, but the car is stopping at neutral, I push the A/C button to turn in on. Running the air conditioner off battery power This is going to seem pretty silly, but during particularly rough (and thus low sleep) weeks, I like to take a nap in my car during lunch. Vehicles without air conditioning or needing A/C repairs will have steamed up side and back windows which continually need wiping to clear. However, you should have it fixed before strain on the system leads to compressor failure. Your air conditioner is an expensive, complicated piece of machinery that requires a trained HVAC specialist to safely inspect and repair the equipment. The compressor can pump the Freon more easily when the car is running at a high speed on the highway but it struggles when the car sits idle. Having your car's air conditioning go out suddenly can ruin your day fast. The engine running turn the A/C on max cool, set fans high, and make sure that the clutch is engaging on the compressor. Repeatedly cycling on and off is part of the normal operation of an AC system. This is incorrect- it is either on or off- it is not a multi-stepped setup. (The compressor needs to decompress before restarting. If you keep driving but shut off the AC for a while then turn it back on does it work briefly again? Once it stops working leave the AC running and check the high and low pressure lines under the hood and see if the smaller line is very warm and the larger diameter line is very cold. If you're about to go to bed and want to avoid nightmares, you might want to put off reading this until morning. Whether it's a full-size unit or a window AC compressor not turning on, Repair Clinic can help you reach your optimal air temperature for comfortable habitation. When I turn my air conditioner on my car starts jerking and some times even stalls. Here's how to check the fans: Warm up engine with AC off. The orifice tube inlet filter screen will always tell a story about the condition of the auto AC system. Yes, there is an electric cooling fan (s) up near the radiator that need to be running when the A/C compressor is on and you are at slow speeds or sitting in traffic. Again, most common reason for an A/C compressor not engaging is a lack of refrigerant (check that first). That's why the magnetic clutch is there. A car’s AC compressor can last anywhere from 5 to 20 years, depending on usage amount and maintenance. It's not the fact that your air conditioning system is cycling that is a problem, but the frequency that indicates problems. Which engine is in your car a Vulcan or Duratec? Assuming its a Vulcan flushing the heater core is a simple matter of. In reading these posts, there does not seem to be a consensus on when the compressor should run. Has a rebuilt compressor purchased 2 years ago. A few ounces short of a full charge can result in inadequate cooling under high heat loads due to lack of reserve refrigerant. Check the pressure on the (large tube side) and it reads about 150 psi. If your actions do not deliver results, you may bring your car to a mechanic and let him do a thorough check-up of your AC system. The compressor can only work so hard though, and when it reaches the maximum it can work, it will kick off. If you’re about to get in the car, please read on. An air conditioner has a typical lifespan of around 10-15 years (According to the National Association of Home Builders – “Life Expectancy of Home Components” ),. AC Compressor AC compressor is a smaller engine in itself and puts a lot of stress on car's engine. What could cause this issue?. Be aware, the law may require you to repair the system instead of just topping it off. Your car's defroster uses air conditioner Q I have a 2007 Subaru Outback. Plus you can hear it snap in when it gets power. Although there are lots of other problems that can cause poor cooling the two mentioned above are ones that I find often. Could this be a bad bearing? If I remove the belt and spin the pulley by hand, it is smooth but makes a light metallic grinding sound. When figuring out whether to repair or replace your air conditioner, take a look at its age. If you turn the AC off at night when it is most efficient (no sun and cooler temps allow it transfer heat better) and let your rooms heat up and then try to cool the air, furniture, walls, etc. Then this spring during the first warm day the AC didn't turn on, took it to the dealer and they said it was OUT of refrigerant. These symptoms of AC compressor failure can happen due to failing electrical components or even a fan motor that has become dislodged and is rattling around inside the condenser unit. Did not want to charge the system if there is refrigerant at the correct level. If your AC won't turn off, you might not notice the irony of the situation right away. He replaces the fan and drops the car off at my office, saying the problem is solved. What we recommend: Call an AC technician to find and fix the leak. The fan will not shut off even when the thermostat 3-way switch (Cool-Off-Heat) controller is in the OFF position. does any one know of a air conditioner that could be used in a car, that runs off of the D/C current of a car of using a converter to use A/C power. As for the drier, it definitely needs to be replaced. When these parts are broken, the compressor simply wont run properly or run at all. It also fits with the earlier symptoms of the AC randomly not working before it went out completely. The noise was definitely a bearing sound. I have a work around in mind. Since we are asked this question so often though, we do have a few good answers ready to go. AC system cutting on and off rapidly. Electric Air Conditioning Fan Sometimes an extra electric fan is placed in front of the condenser to provide an extra flow of air during warm weather, or for times when the car has to idle for a long time. Get your AC working again with a new compressor. It does not use up refrigerant. I was told by the dealer where I bought my motorhome from that it is more economical to run my roof air conditioners (heat pumps) while driving than to run the engine air conditioning. Note: the car has about 120,000 miles on it. The mechanic tells me that the system is under excessive pressure and the relief valve blew to protect the compressor. turn the car off, clean up any spilled. The compressor should run in the A/C mode, the defrost mode, or the Defrost/floor (mix) mode. She does run the air conditioner a lot, but 68K seemed to be very early for a problem to arise so I read through a bunch of threads on various forums. Don't Miss: This Hair Care Product Will Keep Water Spots Off Your Car for Good. This is a blunt fix and you would be much better off getting it to a proper shop that has the right tools to read pressures, and ideally evacuate the system so that no water or other contaminants are present (which they most likely are). You can clean leaves away and improve air flow.