Hey guys, I know I have seen the thread before, but have been looking for 2 hours now, I need to disable the A/C compressor when running the heater and defrosters, only want it on when the A/C is on. any help appreciated.

 

Welcome to Dodge Forum!!!!
Unless you are a very good computer programmer and can re-write the signals in the PCM that tell the compressor to operate, it aint happenin'.

The A/C is soposed to cycle while the heat is on. One reason is to keep the freon and compressor from freezing up in the winter. It also keeps the refrigerant oil circulated in the system.

 

well that bites. I did it on my Nissan and would swear I had seen a write up on here for it also, Thanks .

 

^ What he said, also it keeps the seals in the compressor from drying out.

 

There is a write up from years ago on here, i know what your talking about.

 

Might want to go thru the archieves to find it.................jasonw

 

It also cycle when on defrost to help reduce condensation on the windshield.

 

I think it was somthing simple like, putting a jumper wire on the ac switch or something to that effect. It was a long time ago. I think people think they are getting robbed power or mileage when the ac kicks on and off.

 

im not sure about dodge, but in my chevy, if you purge the lines out, the ac compressor will not cycle to keep from damaging itself.

 

should be sumthin simple like clippin a wire on your switch.....does the pcm even have anything to do with the a/c? (purpl)