A/C Clutch Not Engaging. Need help.

[sneaky98gt]

This started yesterday afternoon. I drove for about an hour and half from home to school (with the AC on, like I always do), parked at my apartment, came back to my car an hour later, and the AC wasn't working. I got out and the pulley is spinning, but the clutch is not kicking on, although I can still spin it freely with my hand. The plug into the AC appears to be fine. Fuse is also fine. Because it was still blowing cold when I got out of the car, I think the R134 is fine, but I could be wrong. My dad said that there is probably a pressure switch that will not allow it to come on if it is too high or too low. I'm going to get him to check it tomorrow afternoon (he has gauges and vacuum pump and all that), but I have about 4 hours of driving to do between this afternoon and tomorrow, and it's about 95 up here.

Any ideas on what's causing this?

 

[CC'S95GT]

it could be low on freon, or low pressure sw. is bad
or a problem with the ccrm

 

[duff daddy]

or your air gap could be excessive thus not allwing it to engage..... get the maifold gauges out nd go from there. stop guessing and diagnose.

 

[jmstang66]

i'm having the same problem man..mine just blows hot but the clutch isnt engaging..hmm

 

[duff daddy]

or your air gap could be excessive thus not allwing it to engage..... get the maifold gauges out nd go from there. stop guessing and diagnose.

you need to do what he said too!!

 

[sneaky98gt]

I'm back home now and my dad will be checking the pressures tomorrow. Will report back then.

 

[sneaky98gt]

Refrigerant is fine; low pressure switch is fine; there is no voltage going to the clutch on the compressor, so that means it's electrical and not the clutch or compressor.

Anybody got a wiring diagram for the AC system? I need one right quick like.

 

[sneaky98gt]

Have power all the way to the wire going from the clutch cycling pressure switch to the CCRM.

Where is the CCRM?

 

[sneaky98gt]

We have power all the way to the CCRM.

Is there any way to confirm if the CCRM is bad or not? And where is the best place to get one? I see that O'Reilly has one, but I've read elsewhere of someone have trouble with Advanced Auto CCRMs (same part number). Any advice?

 

[sneaky98gt]

It was the CCRM, or well, the relay in the CCRM that controls the air conditioner clutch. There was a bad solder joint. We soldered up that joint and put it back together and the AC went back to working. I'll get some pictures up in a bit.