A/C compressor what could cause the clutch not to engage?

Hi,

Several different things can prevent the compressor from engaging. For example, low refrigerant, a faulty clutch, a pressure switch, a faulty climate control unit, and the list goes on.

When you checked the fuses/relay, did you confirm there was power to and from the fuse and that the relay (primary side) was being energized? If not, do that.

Here are two links that explain how to check both:

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

https://www.2carpros.com/articles/how-to-check-a-car-fuse

If both are good, then chances are it is resulting from low refrigerant. If the system is low, the low-pressure switch will prevent the compressor from engaging. Keep in mind there are other things, but that would be the most likely cause. Take a look through this link as well. You may find it helpful.

https://www.2carpros.com/articles/car-air-conditioner-not-working-or-is-weak

Let me know your thoughts.

Joe

I would connect a A/C recharge kit to see if have refrigerant, if so the compressor relay is a common failure point, but you should check the fuses which there are many, here is a wiring diagrams so you can see how the system works and which fuses to check, also I have included the compressor relay location so you can swap it out.

https://www.2carpros.com/articles/air-conditioner-how-to-add-freon

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