Silver Fox
Well-Known Member
- Joined
- Apr 17, 2003
- Messages
- 1,150
My a/c decided to stop blowing cold air. The compressor clutch is not engaging even when jumping the low pressure switch.
The system was converted to R-134 in 1999 according to the sticker on the a/c system. I bought the car in 2005 with no issues with the a/c until 2010, when the low pressure switch gave out. If I recall we added about one half pound of R-134 when I replaced the switch. It held vacuum when we added the freon.
I can find three electrical plugs on or near the compressor - they are all plugged in and tight (one on an aluminum line (going to the compressor) with three wires, one in the rear of the compressor with two wires, and one of the front bottom of the compressor near the clutch with two wires on it).
The 25 amp fuse in the car for the a/c is good (ohmed it out to be sure).
The cooling fan does not kick on when I turn the a/c on (but the car was not fully warmed up either when I tested it).
The last time I used the a/c it worked great on a 100 degree day. The only thing I have done to the car since then is changed the motor mounts and took the valve covers and plenum off to have them powdercoated. I don't see how either of these could have any bearing on the a/c though, unless I may have accidently disconnected something.
Any tips on what to try next?
I thought about attaching some jumper wires from the battery to the compressor clutch (which I take it is the plug in the front), but cannot really figure out how to connect power/attach alligator clips to the connectors due to the location of the connectors.
Or do I need to have it hooked up to some pressure gauges to see if perhaps my R-134 leaked out?
I'm hoping someone can point me in the right direction, as electrical and a/c issues are both areas I can stand to improve in.
Rob
The system was converted to R-134 in 1999 according to the sticker on the a/c system. I bought the car in 2005 with no issues with the a/c until 2010, when the low pressure switch gave out. If I recall we added about one half pound of R-134 when I replaced the switch. It held vacuum when we added the freon.
I can find three electrical plugs on or near the compressor - they are all plugged in and tight (one on an aluminum line (going to the compressor) with three wires, one in the rear of the compressor with two wires, and one of the front bottom of the compressor near the clutch with two wires on it).
The 25 amp fuse in the car for the a/c is good (ohmed it out to be sure).
The cooling fan does not kick on when I turn the a/c on (but the car was not fully warmed up either when I tested it).
The last time I used the a/c it worked great on a 100 degree day. The only thing I have done to the car since then is changed the motor mounts and took the valve covers and plenum off to have them powdercoated. I don't see how either of these could have any bearing on the a/c though, unless I may have accidently disconnected something.
Any tips on what to try next?
I thought about attaching some jumper wires from the battery to the compressor clutch (which I take it is the plug in the front), but cannot really figure out how to connect power/attach alligator clips to the connectors due to the location of the connectors.
Or do I need to have it hooked up to some pressure gauges to see if perhaps my R-134 leaked out?
I'm hoping someone can point me in the right direction, as electrical and a/c issues are both areas I can stand to improve in.
Rob