Summer - its about here and my AC does not work.

before I take it in to have a diagnosis done to it I want to first be able to get the A/C compressor to kick on.

As I understand it (and that may be not much) if I turn on the A/C the Hi fan should kick in correct? Mine does not. Does that mean the A/C relay could be to blame? And does that also control the compressor turning on?

 

you can usually force the ac compressor on if you bypass the low pressure switch. AKA short the 2 wires to it together then start the car and turn on the a/c for a second. You should feel it kick in.

 

If you need a relay I can pull the one from my car. I don't have AC anymore.

 

I appreciate the offer, but I have already ordered a relay.

 

Dang it. I wasn't looking for more than shipping. Sorry I didn't get to you in time!

 

No biggie, replacing can't hurt either. If that's not the problem then the old one becomes backup.

 

Ok new relay in. My fans kick on but my compressor does not.

Where do I go from here?

 

Clutch?

 

I assuming you mean the compressor clutch. It spins freely.

I will check to make sure there are no loose wires. How many wire. Injections are three?

And,is there a fuse to check. I couldn't find one labeled for the AC.

 

Can you tell me where the low pressure switch is? I'd like to test it as I just tried to charge my system and could not get my compressor to kick on.

 

the compressor will not run because you have no refrigerant in the system. It has probably leaked out the front seal on the compressor. the press sensor is under the driver's side headlight, bypass momentarily (a second or two) to see clutch pull in, then recharge the system like you need to anyway.

 

Hi, I pulled a vacuum and checked that there was no leaks before charging. I got about 80 psi on the high side without the compressor engaging so there is freon in the system. I'm hoping that it's the relay.

 

I looked for this sensor but the only thing I saw was what looked like a sensor with two wire attached to it. I saw no evident button to push but there did seem like a small circular indent between the wires. Is this what you're speaking of to test the compressor.