A/C question

[vinnieTy]

Is there some kind of resister that engages the compressor to go on? This is my problem...I can turn on my a/c one day and its cold and works great and other days the compressor doesnt go on. I was thinking maybe the switch is bad but the RPM's do go up when i turn it on the compressor just doesnt. Is there some thing else like a resistor, fuse, or solonoid that tells the compressor to engage. I know i have freeon and like i said it works great sometimes. I was thinking maybe a bad interior switch....but again not 100% sure.

thanks

 

[MyNewSy005]

Re: A/C question

I had a similar issue. Check 2 things:
1. See if there is enough freon in the system. if its too low the low pressure switch wont engauge the compressor
2: check your low pressure swtich itself. jump the switch with a fused wire. if the compressor turns on then the switch is faulty.

 

[vinnieTy]

Re: A/C question

I had a similar issue. Check 2 things:
1. See if there is enough freon in the system. if its too low the low pressure switch wont engauge the compressor
2: check your low pressure swtich itself. jump the switch with a fused wire. if the compressor turns on then the switch is faulty.

Where is the low pressure switch located?

 

[turbodog]

Re: A/C question

Sticking out from the side of the dryer (cylindrical aluminum gizmo)

 

[MyNewSy005]

Re: A/C question

its the electrical connection at the reciever/dryer: the long cylinder thats between the fender and the upper intercooler. toward the back by the heater box is a connector with 2 wires. you pinch the connector and pull it off. the pressure switch screws into the dryer. if you jump the two leads on the wire and the compressor turns on (obviously make sure your interior switch is set to AC and the fan is at full) then its the switch itself.

Just buy a new one and swap out. the dryer has a schrader valve inside so you will hear a slight hiss but it wont let the freon out. 2 minute job.

 

[Quatro]

Re: A/C question

If you jump the low pressure switch and the compressor comes on, you are most likely low on freon as you are bypassing the switch when you jump it.