When the car AC clutch won't engage you turn on the air conditioning and patiently wait for cool air that never comes. You probably felt something a little different when you requested AC from the control panel. When the compressor kicks on you can usually hear a click and feel the engine struggle with the extra load. Manufacturers do their best to mask both of these symptoms of a properly operating air-conditioning system.

1. Chevy Cavalier Troubleshooting Guide 2018 Air Cond Problem Ec
2. Chevy Cavalier Troubleshooting Guide 2018 Air Cond Problems
3. Chevy Cavalier Troubleshooting Guide 2018 Air Cond Problems

• Updated September 30, 2018. If your car's air conditioner isn't blowing cold air, you may need to recharge the AC unit. You could take your car to a mechanic. The best way to determine this is to check your car's owner's or repair manual. If your car was. Diagnose and Fix Your Car's Air Conditioning Problems.
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However, you can still kind of feel when the compressor is kicking in even on newer cars. Popping the hood with maximum air-conditioning selected often reveals the problem of the car AC clutch not engaging. Although the belt driven pulley is spinning you can see that the front of the compressor unit is not turning with the engine.

That front plate connects to the compressor driveshaft and should be engaged against the pulley in order to operate the compressor. Here we'll discuss some of the common causes of a car AC clutch not operating properly. Proper Car AC Clutch Operation. In order to figure out what's wrong with the car air-conditioning system we need to understand what happens when we engage the compressor from. As you can see from the image on the right we have three separate pieces that need to operate correctly to engage the compressor.

The front piece is the compressor clutch assembly that connects to the driveshaft. The middle section is the pulley that is driven by the engine drive belt. The innermost component is a powerful electromagnet that pulls the clutch against the spinning pulley. The click sound that you hear when you request air conditioning is the electromagnet energizing and instantly pulling the clutch against the pulley. This turns into an audible click sound. Some automobiles provide a lot of insulation in the engine compartment.

Therefore, it's necessary to open the hood and have a friend turn on and off the air conditioning to physically see if the clutch is engaged. If it's not, continue reading in the following sections to uncover some common causes of a car AC clutch that won't engage. Where to Start AC Clutch Diagnosis When I see an AC clutch that won't engage I start by examining the compressor's electrical connector. The AC compressor generates a lot of heat and vibration.

All too often this powerful combination can take its toll on the electrical connection. You can even try wiggling the connector to see if the AC clutch turns on. In the next step we verify that voltage and a good ground exist. Although car air conditioning remains a vastly complex system the connection at the electromagnet that engages the compressor remains a one, two or three wire connection. Note that on a one wire system they use a case ground for the electromagnetic coil. The integrity of this ground requires inspection on these models.

If you have a 12 V request signal and a good ground, then the problem resides in the compressor area. With that said, failure of the electromagnet that engages the compressor driveshaft remains few and far between. Nevertheless, a few automobiles are prone to problems in this area. As an example, the Honda Civic and Honda Accord cars of the late 90s and early 2000 model years fall into this common failure category.

In fact, compressor replacement parts come in at reasonable prices due to demand for these units. However, it's more likely to find a lack of AC request signal at the compressor connector when the compressor fails to kick on. Common Problems with the AC Request Signal. As mentioned in the first step in diagnosis you usually find the reason the compressor won't kick on stems from its not receiving a power signal.

Although the possible causes form an extremely long list, we're fortunate that several common issues cause more than 75 percent of the problems. Let me throw out the best case scenario first. Failure of the air conditioning relay becomes something that you'll find on aging automobiles. On a 10 year old vehicle with 100,000 miles there's a good chance the relay failed. Again, this becomes somewhat model specific. Jeep and Chrysler cars and trucks experience more failures in this department than other automobiles.

I have a detailed article about and I hope this represents your problem. By far the most common failure found when a car AC clutch won’t engage is low refrigerant. You can find out how much Freon remains in the system with an. The refrigerant carries an oil charge that lubricates the compressor.

If the Freon leaks out so does the lubrication. The manufacturer uses a low pressure cutout switch to prevent damage to the internal workings of the compressor. These pressure sensitive switches can fail.

It's tempting to jump this low pressure switch to test this theory. You should never do that. If enough Freon leaked out the compressor will run in a dry state. And just kicking it on can prove disastrous.

When a compressor self-destructs from lack of lubrication it turns into one of. The way to handle this is to connect a set of air-conditioning manifold gauges to the high and low pressure test ports.

If the low pressure side reads below 20 to 40 psi there isn't enough refrigerant to engage the compressor. At this point many will just throw in a can of Freon and the system might operate for a while. However, if you find the system with low Freon levels this means you have a slow leak.

How long the recharge lasts becomes an indication of how serious the leak is. People are often tempted to throw a can of leak sealer into the AC system.

This is another area that I covered thoroughly. See my opinion on. Uncommon AC Compressor Clutch Problems Some automotive manufacturers are too smart for their own good. They take a complex system and make it even more complicated.

These automakers send an AC request signal through. Although the reason behind it remains valid, the implementation represents a weak link in the chain. In other words, a bad ECM can cause the air-conditioning not to work. In other cases, car designers built in an AC request signal that's generated from the climate control panel or body computers. After testing the areas mentioned above it might be time to turn your attention to model specific common air conditioning electrical problems.

As an example, here's a link to an article about that stops the air-conditioning from coming on. Here at fix my old ride we dedicate a section to diagnosing and. In addition, we dive much deeper into fixing and the common problems associated with them. Finally, if you're interested in other automotive topics, visit.

No matter what time of year it is, you expect the air conditioning system in your car to be working properly. It could be an unexpectedly warm fall day or an overly wet and humid day where you just want to dry out your car or defog your windshield.

Either way, when you find your air conditioner not blowing air or not turning on, it can be extremely frustrating. Usually fixing a problem like your air conditioner not blowing us a relatively easy fix. If you are actually getting no air from the ventilation system in your car, you might now have a problem with your air condition system at all! If you’re getting air to blow but it’s not getting cold, that’s a different problem but hopefully still an easy fix.

Is the Fan Not Working in Your Car? Most vehicles today have one multi-speed fan that blows air through a series of ducts and vents based on the driver’s selection. These different speeds are usually controlled through a set of resistors or small computer module which is controlled by the fan switch.

The resistors or module get hot as they power the fan so, often times, they can burn out causing certain speeds of the fan in your car to stop working, the fan to get stuck at a certain speed, or the fan to stop blowing altogether. Since these resistors get hot, many car manufacturers will install them into the ventilation ducts of your car to keep them cool. Changing them can be as easy as removing two screws and one electrical connection and installing a new set of resistors or a new module which are available at your local parts store. Although each vehicle is a little bit different, these systems are often very similar so this may be helpful. Why Is My AC Blower Not Blowing Cold Air?

The second problem you may have on a hot day is having your ventilation system continue to blow warm air even when the air conditioner is turned on. This problem has to do with your air conditioning system itself. Your air conditioning system uses a refrigerant, a compressor, an expansion valve and two heat exchangers to cool the air inside the cabin of your vehicle.

For a more in-depth look at automotive air conditioning systems, read this article! With little or no use during a long winter, the air conditioning system may have problems when re-engaged. Occasionally there could be problems with the compressor, but usually, the problem is a slow leak that has caused enough refrigerant to leak out causing your air conditioner to malfunction. How To Fix a Leak in Your Car’s AC System To fix your air conditioning system, you must first seal the leak and then replace the lost refrigerant.

Can accomplish the most difficult part, sealing the leak, all in an easy to use aerosol can. Red Angel A/C Stop Leak and Conditioner comes in an easy-to-use container with an attached coupler for the R-134a air conditioning system in your vehicle. Red Angel A/C Stop Leak and Conditioner is a powerful leak stopping agent that will not harm or clog any of the components in your system and will remain inert in the system until it reaches the leak. The temperature differential at the leak will activate the leak sealer in Red Angel, sealing the leak permanently.

Once the leak is sealed, you can add the correct amount of R-143a refrigerant to your system getting your air conditioning back to cooling like normal. Stacey- Thanks for your question about your air conditioner!

It is possible that your cooling coils are freezing up which will reduce the air flow through your vents. Once you turn off your air conditioner it will thaw and could allow cold water out into your air vents which could be what poured out onto your gas pedal. The most common cause of frozen cooling coils in your car is a dirty cabin air filter. They are usually very easy to change yourself. If you find your cabin air filter and it is dusty, dirty or filled with debris then that is mostly likely your problem. Most major auto parts stores carry a wide variety of cabin air filters for most vehicles and may even help you install it. Jihn, Thanks for your question about your 1997 E320.

The blower motor in your car is under the passenger side dashboard. If you can get to the bottom of the dashboard there should be a plastic panel on the passenger side you can remove to expose the blower motor.

There are 4 screws that hold it up under your dash. It is a common problem in these cars for the regulator to go bad keeping the motor from running on high speed. There are a few different options available for replacing that regulator with a new less expensive model so you may consider that before replacing the whole blower motor. Diamond, Thanks for your question about the AC in your SL2. Your AC only working on high probably has to do with the blower motor resistor.

It controls the speed of your fan and if it brakes it will only work on high. Try replacing that resistor first to see if you regain control of the fan speeds. Your AC only working while you are driving might have to do with a low refrigerant level, or it may be an indication that your electric fans are not turning on. Try checking the fuse and relays for your fans to make sure they are turning on when you turn the AC on. Cipriana, Thanks for your question about your AC. Depending on what kind of car you have, it should be a pretty simple fix. The problem sounds like it is with your blower motor, not your AC system.

Hopefully, the blower motor simply blew a fuse. Find your fuse panel and check the fuse for the “blower motor” or “vent fan” or something like that.

The other possibility is that the fan resistor is completely burnt out and needs to be replaced. That is also a quick and relatively cheap fix. Worst case, your blower motor itself actually went bad, but that is very unusual.

Lawrence- From your description it sounds you’re having trouble with the blower in your car. It is possible that while washing your car you got some water down into your ventilation system and that has caused a short in the blower motor. Hopefully the motor itself is good and it’s just a wiring issue.

Depending on what kind of car you have, the blower motor can be relatively difficult to get to, but they are usually located behind the dashboard on the passenger side. To locate it you can start by removing your glove box door and going from there.

I bought a used 2004, F-150 Heritage. When I bought it, the a/c blew nice and cold but only on high. So, I assumed I needed a new resistor. After a while of this, I started it one day and it did not blow at all.

Then another day, It blew but after slamming the door hard after getting in the truck. Now, it just stopped all together. Ok, I struggled to get out the old resistor (mostly by feel as it’s cramped down there) and it looked like it was in good condition. So, I put the new one in and checked the fan. No blower at all on any speed, with a new resistor.

I am lost now on what to do. Thanks, Nick. Nick- The problem you are describing does sound like a blower motor resistor problem, so it was smart to replace that. The fact that things changed when you slammed the door makes us think it is probably a wiring problem. Tracking down electrical issues like loose wires can be very tedious. To get you started, check out our article about that here:. The next component to look at would be the fan speed knob in the HVAC controls and then the actual blower motor to make sure all the wires are connected properly and have continuity to the next junction or component.

It may help to find a wiring diagram for your truck as you’re going through the process to help you keep track of what you’ve already checked. Linus- Thanks for your question about the air conditioning in your Ram. If you haven’t yet, we recommend starting by checking out our article about diagnosing electrical issues here:. It sounds like the burning smell you noticed and the AC not working are related and since you noticed the smell in the cab of your truck it sounds like you may have a short in the wires in your ventilation control panel.

If you can, try removing those controls and look for burnt or blackened wires. If you don’t see anything wrong there, you can try starting at your AC compressor and finding the wires going to it and trace them back to the wiring harness again looking for burnt spots or anywhere they may have shorted out. If you find an area of burnt wire and have the patience, simply remove all the burnt wire and replacing it with the same gauge wire. Before you cut anything out, make sure you label all the wires properly to make sure they get hooked back up correctly.

If you don’t find any burnt wires, try heading to your fuse panel and looking for burnt out or melted fuses to help you find the source of your problem. Thanks Again!

Jenny- Thanks for your question about your 05 Focus. If you don’t have any air blowing then the problem is with your blower motor rather than your AC system. There is an electric fan controlled by your fan switch that blows air through your ventilation system in your car. Most of the time these problems are caused simply by a blown fuse so we recommend finding the fuse panel inside your car and checking those fuses. It is also possible that the fan switch, fan motor, fan resistor or the wiring is causing the problem.

For a quick read on electrical problems like this, check out our article about that here: Thank You! Ryan- The climate control system in your car uses a series of motor controlled doors to direct air in the ventilation system. As these doors move they direct cabin or outdoor air over the heater core or straight through the ducts.

Chevy Cavalier Troubleshooting Guide 2018 Air Cond Problem Ec

It sounds like the air is being cooled by a properly functioning air conditioning system, but then some of the air is mistakenly being directed over the heater core as well. This is most likely due to a burnt out servo motor or a stuck ventilation door.

Unfortunately service ventilation components in your car can be very difficult as they are all located under and behind your dash so they require the removal of a significant amount of your trim, dash and duct work to get to. If you’re confident and have the time to do that work, changing the burnt out servo motor or realigning the duct door is a relatively easy job. Leslie, Thanks for your question about your Chevy. It sounds most like you’re having some sort of electrical problem with your ventilation controls more than with your AC system or heat.

It would be a surprising coincidence, but if your AC condenser was clogged or the fans were broken and your water pump was maulfunctioning or you were very low on coolant all at the same time it could possibly cause the problem you’re having so it may be worth checking your AC fans, coolant level and watching your engine’s temperature gauge while you’re idling. The ventilation control in your truck is a module that can malfunction so that is also possible. Unfortunately, it would be difficult and take a lot of patience to test all the outputs to see if the module was indeed faulty. You can try calling a local Chevy dealership to see if this is a common problem for your truck or you could try finding another ventilation control module from a junk yard or Ebay and see if it fixes some of your problems. Beverly, Thanks for your question about your daughter’s Mazda CX7. It sounds like the problem you’re having isn’t actually with the air conditioning system, but with your ventilation blower motor.

The fact that it is intermittent and no air blows at all when it breaks makes us think it is an electrical issue. When things get hot, like when your car has sat in the sun all day, often electrical issues can show up due to higher resistances and expansion of components. For a short read on electrical problems, check out our article about that here:. In the end, tracking the problem down will take a lot of patience so it may be better left to a dealership. Lashana, Thanks for your questions. First, let’s get your air blowing again in you equinox. The fact that it doesn’t blow at all is an indication that something is wrong with your blower motor.

Hopefully, you just blew a fuse so try locating the fuse panel and checking the fuse for the blower. If that isn’t the problem you may have a faulty motor control switch or loose wiring to your blower motor as those don’t often fail.

Once the blower is working again if your AC works, great! If not try adding BlueDevil Red Angel AC Stop Leak (available here: ) then adding freon again to get things back to normal. For your Grand Prix it is possible that your hear core is clogged so check your coolant color and make sure it’s bright green and clear.

Chevy Cavalier Troubleshooting Guide 2018 Air Cond Problems

If it isn’t flush the system and see if that fixes the problem. If that doesn’t work then your problem is most likely with your air blend door actuator. Replacing that actuator is difficult as it requires the removal of a lot of the interior of your car so it may be best left to a mechanic. Tom, Thanks for your question about your Dodge Ram.

It is possible that your problem is with the blower motor assembly. You’ve ruled just about everything else out except for a wiring issue. Most of the time blower motors fail mechanically meaning the bearings go bad or the fan blades break before they fail electrically, but it is a possibility. Before replacing the blower motor, we’d suggest checking out our article about diagnosing electrical issues and seeing if all the wiring is correct and intact first.

You can read that article here:. Thanks again for your question! -BD Auto Pro. I have an 2003 jeep grand cherokee the ac works when it feels like it. Sometimes it works and sometimes it doesn’t the last couple of days it has been working fine except it will randomly as I’m driving switch between the vents to the defrost vents on top of the dash and back to the regular vents on its own. Also as I am typing this I remember for a while only 2 or 3 of the 4 vents in the dash sometimes in the past would have air blowing from them. Now all of them seem to be working but it just switches randomly between the dash and the vents.

Any suggestions as to what might be the cause?? Stephanie, Thanks for your question about your 2003 Jeep Cherokee. It sounds like the problem is actually not with your AC system, but with your ventilation system. There are a series of doors and flaps inside the vents in your Jeep that control which vent the air blows out of and whether it goes over the cooling coils, the heater core, or both. I believe on your jeep these doors and flaps are actually controlled by actuators that get their motive force from vacuum from your engine. Your problem might be caused by a leak in one of the vacuum hoses attached to the actuators or a broken check valve somewhere in the system.

Due to where the lines are located, inspecting each of them can be quite the project, and the vacuum hose is relatively cheap so we would recommend simply replacing the old vacuum lines while you’re inspecting them to make sure you don’t have any leaks. Thanks again for your question! -BD Auto Pro. Julia, Thanks for your question about your Toyota Camry.

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The problem you’re having sounds like an electrical issue with your ventilation blower motor. It sounds like for some reason the fan is losing power. That could be due to a bad fuse, a bad blower motor resistor or loose wiring. You can check the fuse easily, simply find the fuse panel in your car, it will be somewhere on your dashboard, either below your steering wheel, at a kick panel or outside by where the door closes.

Since the problem is intermittent you can try simply replacing the fuse even if it looks good as they are inexpensive at most auto parts stores. If your fan stops blowing on one speed but works on another, then you have a bad blower motor resistor.

Those are also relatively easily to replace on your car with simple tools and a little research. If neither of these turn out to be the problem then you’ve got a loose wire somewhere either on the motor, the ventilation controls or in between. Wiring problems can be a lot of work to chase down, but if you have patience and the right electronic meter you can do it. Try checking out our article about electrical problems here:. Thanks again for your question! -BD Auto Pro.

Hi I have a 1999 Ford F-150. A few years ago my AC stopped working. The vents blow air just fine but it’s just not cold air. I have added R134a refrigerant and saw the compressor begin to engage properly.

It worked and blew cold air but within a few days to a week at most the air stopped being cold. I also noticed a smell inside the cab of the truck. I am thinking the refrigerant is leaking into the cab causing this smell and through research am now lead to believe there’s a leak most likely on something called the heater core which is behind the dash board.

Chevy Cavalier Troubleshooting Guide 2018 Air Cond Problems

Do you folks concur with the idea? I mean if I can smell it in the cab it must be leaking freon inside there right?

I’ve been told it’s a rather time consuming job to tear apart the dash and replace the heater core so I’d like to be more certain that’s the issue before I delve into it. It’s been a few years since I’ve tried anything again. The couple times I did add r134a the compressor engaged and began to blow cold. It just obviously has a leak somewhere and I’d like your opinion on its likelyhood of it being this heater core thing. Would appreciate any knowledgable input. Thanks, Jim.

I have a 2003 chevy astro van. A few weeks ago I was having problem with the rear air conditioner working. It would only work some of the time. Then it just stopped working.

This knob is completely separate from the front of the van. I also noticed the heat wont even turn on back there now too. I was thankful enough to still have the ac working in the front of my van. But as I was driving it the other day, all of a sudden the vents stopped blowing air.

The ac is still cold. There is little ac coming out the defrost on my windshield, but It wont switch to the different settings.

What do you think I should do?? I would like the different setting to work in my van. Including the rear, ac and heat. The checked the heat too and that wont come out of the vents either.

Stephany, The problem you’re describing in your van sounds like it is more of an electrical issue rather than your air conditioning being broken. That is good news because usually those are less expensive problems to fix. Since you aren’t getting any air blowing, it sounds like your ventilation fan motor is either broken or has an electrical short.

This could be from a fault in the actual fan switch, the resistor pack or the motor itself. For more information on how to track down the electrical problem, check out our article about that here:. Thanks again for your question!

-BD Auto Pro. Irene, Thanks for your question about your air conditioning. The problem you’re describing sounds like your evaporator iced over while you’re AC was running and it sounds like that also shorted out your blower motor. Replacing your blower motor will get your air blowing again and shouldn’t be too difficult of a job depending on what kind of car you have. Once you’ve got a new blower motor installed, you need to make sure your AC system doesn’t freeze again so you don’t short out your new motor as well. First, there should be a small drain hose in the bottom of your air box. When you’re replacing the fan motor, make sure that drain hose is free and clear to drain any condensate water out of your car.

Next, make sure your cabin air filter is clean and not clogged with dust or debris. Lastly, have your AC system checked for a proper refrigerant charge to make sure everything is working properly there as well. Thanks again for your question!

-BD Auto Pro.