Car Ac Compressor Not Turning On

If the refrigerant cannot circulate through the air conditioning system because of a bad compressor, then it is not going to create the cool air that you want. I've recharged these before, but not with a new compressor. So i brought my car the an auto shop near by trying to refill the freon. When the refrigerant is still locating in a compressor, it is often seen as the beginning part of an air conditioning cycle. Any suggestions? just found problem the. If strange noises are coming from the AC, there could be an issue with the compressor and it may need to be fixed or replaced. Not sure what else. If you turn on the A/C switch, the compressor should come to life immediately. I know it has freon in it and is full. Raise the hood. I found the leak was the "o" ring between the low pressure hose and the compressor. Whe I turn it on there is no problem with the blower but it just blows warm air. The A/C compressor is considered the heart of your vehicle’s air conditioning, since it pumps compressed refrigerant throughout the system. My Car AC is Blowing Hot Air. If it does engage and does not blow cold, then you are likely to be low on freon. We have already put the Cooling Fan/ AC control relay under the hood near the battery, the Fuse Box On top of the battery was burnt up and the Ambient Temp Sensor nead the wiper. The clutch is the outward most plate on the compressor, pulley is in the middle, and the coil is nearest to the compressor. 1) Condensing Unit Frozen Wont Turn Off – The first thing is the condensing unit will freeze up if the air handler blower is not running when the condenser is on. Just like any air conditioning unit in a home or even a small mobile AC unit water is produced from the AC Compressor or from the AC condenser. Badgerfan is right. 1 x 12V Evaporator. The purveyors of this myth explain that, with the car going that fast, the belt is. Turn the air conditioning controls to MAX AC and start the engine. Make sure your A/C is running at its best. Even if the system is not charged, the compressor does not turn easily but it is possible to turn. AC Pro Products. It plays a critical role in this complex process, making sure your car stays cool when you want it to be. Air conditioner compressor clutch not engaging. If the belt squeals when you turn the AC on after the car it running, it possibly could be something with the AC compressor, but I'd still start with the belt or the tensioner. 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. Car heater tips: Windows fogging up? Turn on the air conditioner. The o-rings are used to seal the connection between lines and components in the ac system. When ever I turn on the AC or the heater, speeds 1 to 4 it will make a loud ratting/grinding sound that seems to be coming from the front passengers side. If the belt squeals when you turn the AC on after the car it running, it possibly could be something with the AC compressor, but I'd still start with the belt or the tensioner. It worked for about a week now will not come on, put another compressor and a new clutch relay in. At least when the furnace broke last winter, you got cold for free. While there are a variety of reasons your car's air conditioning might not be operating at top performance, the most common are a refrigerant leak, an electrical climate control issue, or a problem with the air conditioning compressor. Turn your unit off immediately. February 1, 2018 — A GM air conditioner compressor and condenser lawsuit alleges the AC systems fail and cause owners and lessees to lose cold air in the vehicles and money from their bank accounts. The Easy Way to Use a Recharge Kit for Car AC; Want to Discharge Car AC at Home? Look into This! How To Manually Engage AC Compressor Clutch. Electrical Load shouldn't be immediately applied to any automobile when turning it's engine on. It plays a critical role in this complex process, making sure your car stays cool when you want it to be. If it doesn't turn on, then your pressure switch could be bad, or your wire to the compressor is broken, among things. Lots of people don't recommend it because no AC service center will service your system and "drop ins" are not compatible with anything. The problem is that you then need to refill them to street pressure before you hit the highway. The problem with topping up your system is you don't know how much refrigerant is in your system to add to it. a/c compressor will not engage, freon is good, put a new cycle switch on and checked fuses "all good". Car AC Smells like Burning Plastic When the air conditioning in your car blows out a burning plastic smell, you should check your car or have it looked it by a mechanic. It also causes it to. However, if your clutch is not disengaging when you try to turn off your ac, then the problem is in your fcm. I checked up to the AC relay and the AC relay is getting power. 5 volts, the compressor will not turn on. AC fans not turning on while AC is on. Electronic Blend Door Actuator is not functioning which would only allow warm air to pass through vents. indicating its on, but the compressor doesn't kick on until the PTS button is tapped twice. I turned the system off and then about 5 minutes later it came back on and was running fine. The air conditioning compressor requires torque from the belt system on the engine to power it. You should also check the air conditioner in the engine bay to see if the compressor is running. When this occurs, the compressor clutch will not engage, and the system will not be cool. Check compressor clutch wiring, electrical connections and compressor clutch, and repair or replace as necessary. After you reassemble the clutch you will know immediately if the compressor is frozenup when you turn on the a/c with the engine running as the belt is going to squeal or the clutch is going to slip. If there is no voltage present, then the system could be low on refrigerant or the low or high side pressure sensor has failed. AC Pro Products. Second you remove the compressor terminal cover and find that one or two of the compressor terminals have burned completel. Initially whenever d car is started d engine will make some noisy sound but when the AC is put on d notice d noise will go down. 1) Turn on the vehicle's engine and turn the air conditioner on and set the AC system's fan to high speed. DNT on Wed April 27, 2005 11:34 AM. Frustrated with ac! compressor hub turning slow SOLVED! Getting pretty frustrated! I have a 93, had it abt 2. Even if I buy that, I will be spending around 6-700 !!:O :O. The center part on the pulley of the A/C compressor will not spin when you have the air conditioner off or if there is a problem. Nevertheless, if this does not help, it might be because you are using a bad AC compressor clutch. Checking The Wiring On The Air Conditioning Compressor How to Fix your Car's AC System. If your AC won't turn off, you might not notice the irony of the situation right away. Look to see if ice has formed on the coils and, if it has, turn on the power and the fan to melt it. 2013 Altima. The most likely answer is that there is a leak in the system and the refrigerant has escaped the system although there are problems with that explanation. So it's it blows cold war × We use cookies to help our site to work, to help us understand how it is used, and to tailor advertising on this and other sites. AIR CONDITIONING COMPRESSOR CLUTCH. You only become concerned when it starts to overheat even the Ac has been turned on for a few minutes, but when you turn it off, you get the normal room temperature. If you swap it out and the compressor is not kicking on you have a different problem. 8L V6 1998 Ford Mustang stopped coming on when I turn on the "AC" switch. Checked the fuse and it is good. If the clutch engages but the compressor does not turn, it means that you probably need a new one. At Bill Joplin's Air Conditioning & Heating, we focus on providing for the air conditioning needs for both residential and commercial customers throughout the McKinney, TX, area. Check the air conditioning compressor clutch wiring for a voltage with the a/c switch on high and fan on high. Third, the A/C compressor relay is a $4 throwaway part, like the fuel pump relay. It allows the pulley that's driving your compressor to be disconnected from your compressor, effectively turning your compressor off. As most of you know, this is the coldest it has been for a sustained period of several days for something like 100 years. Five reasons an aircon can automatically turn itself on and off. The car should not be running at this point. Mechanic says to take it to the dealer. Hook up your gauges and record the static pressure. nothing worse than climbing into your car on a hot day, turning on the air conditioner, and finding that it only blows hot air. IT IS A BAD PRACTICE IRRESPECTIVE OF THE KIND OR MAKE OF AUTOMOBILE. It's going to be summer soon, and in many parts of the world, things are going to be heating up. So start your diagnosis by determining if the compressor clutch works. February 1, 2018 — A GM air conditioner compressor and condenser lawsuit alleges the AC systems fail and cause owners and lessees to lose cold air in the vehicles and money from their bank accounts. If I park anywhere in the sun, the AC does not provide cold air at all. Not sure what else. When I turn the AC on (GM A6 compressor) the alternator "quits charging". If you suspect your AC pump or AC compressor might not be working, there are a few simple things you can do to get to the bottom of it. 5 oz of oil on the entire system. When it's not driving the compressor, the clutch pulley turns on a double row of ball bearings. I get a lot of questions about car air conditioning systems not blowing cold enough. That's because the AC compressor is responsible for pumping coolant throughout your system and starting the process of cooling your car. I get a lot of questions about car air conditioning systems not blowing cold enough. aircon compressor clutch does not engage even with a + 12v supply to it A few basic reasons why an air conditioning clutch does not engage, even if you have a power supply down to the compressor. This is not about my car, but someone elses A4. I've ignored it for a couple of years since I haven't needed AC, but I'm heading across the midwest next week so I'm considering fixing it. Call a professional mechanic immediately if you are not able to start or engage the AC compressor clutch. Buzzing Noise- A sign that the AC Compressor is beginning to go bad, a buzzing noise may be heard when turning the AC on. Fortunately, your air conditioner not blowing is a common problem and a relatively easy fix without having to bring your car to the repair shop. The van stalled and would not start for about 10 minutes. The Answer for frozen air conditioner condensing unit that won't turn off. Before the compressor turns on, a special electro-magnetic clutch, conveniently called the "compressor clutch," is necessary to engage and disengage the compressor cycle. Unlike your car's air conditioner that uses a separate compressor, heat that circulates through the cabin comes from the car. Have a mechanic check over the electrical system for the compressor, and this could put your AC back in business. The circuit is controlled by the compressor relay, which receives power from fuse # 16. My problem is, when driving in the tollways with no traffic and with speed reaching 80 kms per hour, there is no cold air coming out of the AC. If your air conditioning isn't working properly, you may need to replace the A/C compressor clutch to fix the problem. 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. To tell the a/c is on. put 2 pressure gauges on your car. Also, bad compressor. When it's not driving the compressor, the clutch pulley turns on a double row of ball bearings. If the A/C system is functioning properly the thermometer should read between 30 and 36 degrees F and you may find that your electric radiator fan and compressor clutch will be cycling off and on depending on the outside air temperature. We have already put the Cooling Fan/ AC control relay under the hood near the battery, the Fuse Box On top of the battery was burnt up and the Ambient Temp Sensor nead the wiper. Air was working great. This can overheat your compressor, causing unit wide damage. It will be OK but minus air conditioning. Car Air-conditioning Compressor. 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. I have provided a chart below from Saab that shows what readings you should get on cars with an ac time delay relay1986-. Common reasons a car's AC isn't cooling. Reasons why your AC system is not blowing cold air. If it does not, shut the engine off and disconnect the negative battery cable with a socket. If only the pulley is turning. Related Article: What Should You Do When Your Car AC Compressor Not Turning On?. (thus pressure reversal ? I'm not sure) He quoted around 650 (compressor) + 300 labor. Unfortunately, BMW does not sell the components, only the complete compressor assembly. Compressor clutch is new, takes 3 amps to run it (within specs) Alternator is new, puts out 55 amps clean voltage. The 2006 Dodge Ram 2500 has 8 problems reported for air compressor doesn't turn on. To utilize the AC on your car on demand, the clutch compressor is activated. If your HVAC will not turn on, but you hear a humming sound from your outdoor unit, it is likely that this is the compressor attempting to access a non-functioning capacitor. -Low gas pressure (as sensed at the low pressure switch in the LP line) will cause the AC to be disabled, and the fans won't turn. Turning on your A/C on a regular basis can help keep parts lubricated and running smoothly. There is also a high pressure service port. Near the bottom of this page we have a real good Youtube Video made by Acservicetech that shows how to troubleshoot an air conditioner if the air conditioner outside unit is not turning on. 2013 Altima. The first thing to check if your compressor will not engage is the electrical system. Five reasons an aircon can automatically turn itself on and off. The breaker has tripped. A car AC compressor failure will not engage and will often lead to skipping and squealing caused by the friction of the belt. Hello everyone! My car has started making a noise, like a loose belt, when the AC is on and I start my car or idle or put it in reverse. When starting the car the AC Compressor wont come on right away Most of the time when you first start the car the AC compressor will not come on for for 3 to 5 minutes. This means the relay clicked, but did not work as intended. Any suggestions? just found problem the. Do NOT turn the car on while the clutch is off the pulley or when any tools are attached to the clutch. The most likely answer is that there is a leak in the system and the refrigerant has escaped the system although there are problems with that explanation. The condenser is pumping liquid refrigerant to the air handler evaporator coil where air is needed to blow across the coil so the cold refrigerant can absorb heat. Car AC Clutch Wont Engage. You should hear the AC compressor working or attempting to work. Automotive air conditioning system uses an electromagnetic clutch mechanism that engages the compressor to turn the AC unit. So if the compressor clutch is faulty and failing when it gets hot (like after a multi-hour drive), it would essentially turn off your AC. If it's not, you may need to fix the cooling fans on your radiator or replace the cabin air filter. You can jump the low pressure switch (located on the accumulator) and see if the ac clutch engages. How to diagnose my car AC compressor is not turning on. AC compressor is a smaller engine in itself and puts a lot of stress on car's engine. To tell the a/c is on. If your AC is not cooling but runs: 1. When the compressor kicks on you can usually hear a click and feel the engine struggle with the extra load. Faulty compressor clutch: If the clutch is not engaging with your compressor, than your compressor can't maintain the correct pressure. This time around, we get cold air for the first 4-5min of turning the car on and then warm air. But if it happens to you, know that you are not alone. I'm not sure what the low threshold is for the pressure switch (to still allow A/C on), but I would assume much under 70psi. Faulty compressor clutch: If the clutch is not engaging with your compressor, than your compressor can't maintain the correct pressure. I havent used a/c in years so i just wanted to try turning it on and the light on the button doesn't come on anymore. AC Compressor Clutch turns on and off - posted in Virtual Mechanic: Any ideas on why it would act this way? I filled it up to about 20psi and it was working ok but not quite cold enough (just cool). Hello everyone! My car has started making a noise, like a loose belt, when the AC is on and I start my car or idle or put it in reverse. Badgerfan is right. The disconnect contains two small fuses, each registering 120 volts of electricity. But then it stop completely now and i didnt know why. When the aircon system is turned on, the compressor pumps refrigerant vapour under high pressure to the condenser. Interior AC lights are out but come on when I turn the AC on. Filed under Good Questions · Tagged with air, air conditioner, air mixture, amount, compressor, decreases, engine, power, rpm Comments One Response to "Why does my car stall when I turn on my air conditioner?". But if I jumper the large plugs of the relay with a paperclip, the compressor runs with cold air conditioning. Maybe it is a condenser fan? Running on overdrive??? It just seems very loud to just be operating the AC. The dye check will not work if the system is too low and the compressor is not cycling. Still got a full can. The car service manual says the compressor comes with 2. The AC compressor is the most integral part of the air conditioning system which is responsible for pressurizing the refrigerant and its distribution. To tell the a/c is on. 5oz of oil in it, but that the system has to be balanced. This pulley spins at a rapid rate, so please keep tools and hands away while it is operating. Third, the A/C compressor relay is a $4 throwaway part, like the fuel pump relay. If it doesn't turn on, then your pressure switch could be bad, or your wire to the compressor is broken, among things. Because it functions in a continuous cycle on and off, it is subject to wear every time the AC is turned on. Next moved on to the pressure and cycling switches (located on accumulator and compressor discharge tube) Again,. I know that when i switch ON the AC,the clutch at the compressor works. We'll explain more about each one below. Unplug this wire and see if you have 12 volts on the end of that wire. The deal with this car or a pure EV is that there isn't the masking engine noise to cover up all the other sounds. Either way, when you find your air conditioner not blowing air or not turning on, it can be extremely frustrating. AC fans not turning on while AC is on. Air conditioner compressor overview. The thermostat control uses a sensor bulb to monitor room air temperature which in turn operates a set of enclosed electrical contacts to supply power to the compressor circuit. The AC system is closed and should not leak nor should the refrigerant be low. The breaker has tripped. I have replaced many of these. I can "jump" the cycle switch plug and the compressor will come on and the a/c works fine. AC compressor will not turn on, 07 Chrysler Town and Country - Answered by a verified Auto Mechanic We use cookies to give you the best possible experience on our website. With the engine running, turn the AC to its coolest setting and the fans to the highest setting. The other possibilities include faulty pressure switches, faulty compressor clutch, a fault in the climate control panel … etc. DO NOT SUPPLY DIRECT POWER OR GROUND TO A WIRE IF YOU DO NOT KNOW WHAT IT DOES. So if the compressor clutch is faulty and failing when it gets hot (like after a multi-hour drive), it would essentially turn off your AC. Put on the used 1, recharged it (yes,. I have checked at the relay, and it is not getting power (i. February 1, 2018 — A GM air conditioner compressor and condenser lawsuit alleges the AC systems fail and cause owners and lessees to lose cold air in the vehicles and money from their bank accounts. How to get car's A/C blowing cold again. Engaging the AC compressor clutch at home is not rocket science. The AC recharge kit that you have will not work, it actually doesn't even fit on the high. Both have manual controls. In most cases, when the AC is turned on you will. small light under the ac compressor clutch button ? Camera,TTP-C12B 2-in-1 Car Front/Side/Rear. 1) Turn on the vehicle's engine and turn the air conditioner on and set the AC system's fan to high speed. The guys there told me that the AC compressor is out and need to be replace. How does an AC compressor work?. Automotive air conditioning system uses an electromagnetic clutch mechanism that engages the compressor to turn the AC unit. The air conditioning system is a vital part of a vehicle such as a car or truck. This is a full explanation of how the system works. If your compressor is not R134 compliant you will have to change it. If the AC isn't quite as cool as it used to be, the solution might be as simple as recharging the system. If it doesn't turn on, then your pressure switch could be bad, or your wire to the compressor is broken, among things. The air conditioning system may require an extended period of operation to reach the desired output. is c147094p09 - unit mfg in 2002. Still got a full can. The AC compressor is the heart of your car’s AC system and works like a pump taking in refrigerant, (R-12 for older cars, R-134a for cars 1993 or newer and R1234yf for some cars after 2014) then pressurizing it and passing it along to the evaporator. Did not want to charge the system if there is refrigerant at the correct level. You will observe that the belt that turns the AC compressor pulley, will continue to rotate and the outer part of the pulley will turn with it, but the centre part of it will not turn. The air conditioning system is a vital part of a vehicle such as a car or truck. An air conditioner's compressor controls the distribution of cold air throughout the house. Open up the hood and listen for the AC compressor and clutch to engage. BMW E36 3-series Air Conditioning Compressor Inoperative - AC Not Turning On. Air conditioner compressor kicks on and off So after a long winter I tried to use my AC and the fan worked but the air wasn't cooling. At the same time, an undersized air conditioner may not be able to give the required amount of cooling and comfort. The compressor will not cycle off when the A/C is on. does the cooling fan come on? ( it must come on when the ac is on, there needs to be airflow for the condenser to convert the vapor refrigerant into a liquid again) Yes, it does Do the buttons/switches on the dash "feel" normal when you turn on the ac?. my - Jaguar 2002 S-Type question. Air conditioner compressor overview. So, it won’t engage and I’m going to get the wheel, the fender wheel off over on the passenger side here so I can get some good, easy access to the AC compressor in a second and we’re going to run some. But then it stop completely now and i didnt know why. I was thinking the mechanic balls my AC up after putting a 2nd hand head into my car. If it does not, shut the engine off and disconnect the negative battery cable with a socket. If the compressor clutch is engaged and both pressure readings are the same, the compressor has failed. I brought it to the dealer and they said the compressor is shouting off and needs to be replaced. What to Do When a Car AC Compressor Cycles On and Off. AC Pro Products. If the belt squeals when you turn the AC on after the car it running, it possibly could be something with the AC compressor, but I'd still start with the belt or the tensioner. The simplest way to describe a compressor is that it is the part of the AC system that begins the process of turning liquid refrigerant into cool air for a vehicle. AC Facts and Myths. The AC system is closed and should not leak nor should the refrigerant be low. I would check the compressor contactor to see if it was stuck in the closed position. It's not the fact that your air conditioning system is cycling that is a problem, but the frequency that indicates problems. Changing the air filter is as important for your air conditioner as changing the oil is for your car. You can turn the clutch by hand?. I tested with no AC on, but blower on full and do not have this problem. Sometimes is sounds like the compressor tries to come on and cannot and then clicks off. This car has the manual ac with the two scrolling wheels to set temp - NO digital display. Car ac compressor not working ( ac compressor relay )2018 a bad ECM can cause the air-conditioning not to work. So I had suffered for a year or more just thinking the worst. Went to turn over the engine and it just dies. I brought it to the dealer and they said the compressor is shouting off and needs to be replaced. Not sure what else. Each of these can cause the AC to blow lukewarm or hot instead of. I've noticed that generally on the second or third try (say half an hour) it starts and often keep on cooling very well. You only become concerned when it starts to overheat even the Ac has been turned on for a few minutes, but when you turn it off, you get the normal room temperature. A harsh squealing sound can indicate a seized AC compressor. Remove the component from the socket and test for a power signal and a good ground at the proper terminals. Then look at the front of the compressor clutch. Dear all experience people, I have 2003 Lincoln Town Car, it's been good with me since I had it brand new but last month the AC had problem and I already try the best to fix it but the compressor is still not engaging, if I connect directly pin 1 and pin 5 of the relay then the compressor was engaging and AC cold but I can't stop the compressor until turn off the engine. Compressor Terminal Wiring Diagram. There are several reasons for your air conditioning unit to fail. The clutch is not engadeing when I turn the ac on. Turn off the power. In 1954, the Nash Ambassador was the first American automobile to have a front-end, fully integrated heating, ventilating, and air-conditioning system. When the compressor draws in excess amperage, the system shuts down as a preventative measure. is c147094p09 - unit mfg in 2002. The problem is a bit different than the first time the clutch coil went bad. The high side pressure will only increase by about 2 psi, barely enough to move the gauge. The face of a compressor is comprised of a clutch, coil and pulley. 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. The Easy Way to Use a Recharge Kit for Car AC; Want to Discharge Car AC at Home? Look into This! How To Manually Engage AC Compressor Clutch. Before you can start recharging car air conditioning, it’s important to understand how it works. Both have manual controls. when you say "have a freon charge hooked up", do you mean actively charging the system again before turning on the AC? As I understand it, the system was charged, then stopped when the compressor would not start. Louder than if I had a ICE under the hood IMO. Most people would like to see frigid cold air blasting from their small dash vents instantly upon request. My air conditioner compressor does not turn on. Categories: Microsoft Outlook / 25 Responses / by OfficeTutes. The Answer for frozen air conditioner condensing unit that won't turn off. The pulley is turning but the clutch never engages and the compressor is not turning. (Just a quick press will do) I forget the pressure at which the switch will cut the compressor out but you could still have too low a charge which will not allow the compressor to engage. Buzzing Noise-A sign that the AC Compressor is beginning to go bad, a buzzing noise may be heard when turning the AC on. With the engine running, turn the AC to its coolest setting and the fans to the highest setting. Then check that the fuses. I heard some noise in the passenger side of the car but I was not sure what cause it. Remove hose from service port and replace plastic cap when finished. Here are four of the most common:. The AC compressor on my 3. Since I bought the car (from a private owner), the A/C has not given any indications of cooling. It would not disengage. Check compressor clutch wiring, electrical connections and compressor clutch, and repair or replace as necessary. denso car aircon compressor the event you depart, it truly is improved on a hot day to just flip up the thermostat a little. That's why the magnetic clutch is there. If your air conditioner has a rotary type temperature control or thermostat and does not turn on you may have a defective control. (thus pressure reversal ? I'm not sure) He quoted around 650 (compressor) + 300 labor. Start Relays – As with the capacitor, the HVAC technician may try replacing the start relay, which is the only surefire way to determine whether it’s working right or not. I know that when i switch ON the AC,the clutch at the compressor works. Ok my compressor clutch would not turn on so I ran a jump wire to it and it fired right up, also checked freon with gauge and it read fine cold air began to flow. AC Pro Products. – The 15 amp fuse & relay are good in the fuse box under the. The air that is blowing is warm and it is coming from the front feet sections only. Note: the car has about 120,000 miles on it. At the compressor you'll find a quick disconnect wiring terminal that runs to the compressor clutch. I ran a test on the eac unit and it showed a 125 which is okay. If you turn on the A/C switch, the compressor should come to life immediately. It won't turn when the magnetic clutch engages, and you may hear squeals of protest from the drive belt. What could be wrong with my air conditioning compressor?. If your compressor is not R134 compliant you will have to change it. If not, try an independent, the sort who comes out to your house. AC Compressor Clutch turns on and off - posted in Virtual Mechanic: Any ideas on why it would act this way? I filled it up to about 20psi and it was working ok but not quite cold enough (just cool). Engage the emergency brake. Chris, my mechanic, troubleshot the electrical source as described above. Nevertheless, if this does not help, it might be because you are using a bad AC compressor clutch. Junior Member. There are a lot of factors that determine whether your compressor will turn on, including blockages and problems with the thermostat that may prevent the compressor from working properly. So, here is how all the various parts of a car's air conditioning works: Compressor: The compressor is the work horse of the air conditioning system, powered by a drive belt connected to the crankshaft of the engine. Here are 5 telltale symptoms of AC compressor failure. You probably felt something a little different when you requested AC from the control panel. How to get car's A/C blowing cold again. Unlike your car’s air conditioner that uses a separate compressor, heat that circulates through the cabin comes from the car. Any suggestions? just found problem the. Car heater tips: Windows fogging up? Turn on the air conditioner. Checked the fuse and it is good. put 2 pressure gauges on your car. The problem is that you then need to refill them to street pressure before you hit the highway. If there is no voltage present, then the system could be low on refrigerant or the low or high side pressure sensor has failed. Air conditioner compressor overview. You are completely blameless. Check the fusebox first, which is located under the hood near the driver's side fender on 1999 through 2010 Silverado model years and on the left side of the instrument panel on older models (refer to your owner's manual). There is no noise at all when the AC is off. Before going to the repair shop, though, you can check to see if the following reasons are causing that unnerving scent. hi in my 2008 altima 2. The outside condensing unit is making strange noises. Chris, my mechanic, troubleshot the electrical source as described above. Took off the old 1 but couldn't see any signs of damage. If your air is blowing cool but not cold, the problem could be a clogged filter, cooling fan problem, radiator trouble, or it could simply be that you need to recharge your AC.