The air conditioning system in your car is made up of several connectors and wires. With failure at any of these switches, the AC compressor may not turn on. The most notable possibilities include the low or high-pressure switches, as well as the evaporator temperature sensors. ![]() A malfunction with any of the switches can cause it to remain disengaged. Several switches are needed to activate the compressor clutch. Make sure the amperage matches up with the one that was blown. In this case, you would need to replace the fuse with a like one. If the fuse blows, the compressor cannot get the power it requires to run. The compressor clutch might fail to engage for other reasons besides a simple malfunction. Reasons The AC Compressor Clutch Won’t Engage Depending on how bad the leak is, the cooling capacity will be hindered. When the clutch isn’t working correctly, the front seal can start to leak.Ĭar AC refrigerant will leak through the small openings. You may also notice refrigerant leaks if the compressor clutch starts to fail. However, it’s not impossible for the opposite to be true. In most cases, the air conditioning compressor clutch is going to break in a way that renders it impossible to get cold air flowing. You may not be able to turn on or off the air conditioner, no matter what selection you make on the control panel. If the clutch seizes up, as discussed above, the compressor can remain activated or deactivated. Inability To Turn Air Condition On Or Off If left unrepaired, it can cause damage to the serpentine belt, so you don’t want to put off fixing it. If the clutch fails to disengage, the AC will remain on when it shouldn’t. When it doesn’t engage, you won’t be able to get any cold air from the system. If the AC compressor clutch won’t engage, the clutch is going to stop moving. Additionally, this noise can indicate trouble with the bearings. The noise can resemble a squealing that occurs, especially when it first starts running. This noise may start before there are any other symptoms, giving you a heads-up. Loud Noises From The AC CompressorĪs the compressor clutch fails, strange noises occur. Either way, you should start diagnosing the problem before issues get worse. With a compressor clutch not engaging all of the time, you may get cold air occasionally, and it could fail at other times.Īdditionally, there’s a chance that there’s slightly cooler air coming out of the vents, but not enough. AC Might Work For A Short Time And Then Stop Workingīefore the AC quits completely, it might work intermittently. RELATED: 9 Reasons Why Your Car AC Is Not Blowing Cold Air 2. For that reason, a complete diagnosis is needed before replacing parts. With that said, there are a lot of reasons why cold air may be lacking. If you don’t feel any cold air coming from the vents, you may think it’s a lack of refrigerant, only to find out that the compressor clutch is to blame instead. The biggest sign is that you stop getting cold air from the air conditioner. ![]() When this happens, the air may be stuck on or off, plus refrigerant can leak. There may also be loud noises from the compressor or the clutch will stop moving. When the AC compressor clutch goes bad, the air conditioning may not work at all or it can work intermittently. Lesson learned.Conclusion Symptoms Of A Bad AC Compressor Clutch So if you've read this for or just skipped to this paragraph, my A/C is working again after I replaced the A/C clutch hub (burned up because of the force against the high pressure), condenser (not even needed), and recharged the system (about $20 for 2 cans) but the culprit of it all was a faulty connection to the A/C trigger wire not allowing the fan to turn on when the clutch engaged. So I redid the connection and tested it out and now the fan turns on with the A/C like it should and stays on no matter how I move/jiggle the wires. Dammit! There was a faulty connection at the splice for the A/C trigger wire. ![]() So when the pump turned back on I jiggled some wires and the fan turned back on. But I did notice this time though that the fan shut off at some point (Flex-a-Lite e-fan). At this point the clutch disengaged and the problem was the same as before. All was good until I heard the pump trying to struggle and noticed the hi-side pressure was getting close to 450 psi. I checked the thermostat I had in the vent the temp was dropping. The system was taking the refrigerant and once there was enough the clutch engaged and the fan turned on. As I was emptying the 1st can of refrigerant into the system everything was going as normal. I finally received my new condenser in, installed it, and set off to recharge the system. So to give a little update on this in case someone else has this issue.
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