i got a 2000 ram 2o00 with the 5.9 went to use the a/c for the first time and it blows warm a/c compressor doesnt kick on any suggestions?

 

Sounds like it is low on refrigerant.

 

+1 Mine did the same thing, got it recharged with dye added but never found a leak. It's like the refrigerant just vanished.

 

There's a do it yourself refridgerent kit called REDTEK, i used to fill mine up, its colder than the factory and only costs about 30 bucks.

 

Probably have a leak somewhere. I had the same issue and I refilled mine. It was cold for about 3 days and now it is back to warm. I have a leak somewhere I would assume, just haven't had a chance to find it.

 

thats what i thought it was the only thing that makes me think otherwise is that the compressor doesnt even come on at all almost like no power to it ive checked fuses and there all good

 

i got a can of freon at AZ for 20 bucks with the nozzle and guage. mine didnt have ac when i bought it either. i added that can, and now theres ac....so id just try to add some refrigerant....the ac system needs oil too, not sure how to add this, but maybe thats why your ac compressor isnt kicking on....but i have ac and i dont hear mine kick on...

 

Remove the low pressure side switch plug(on top of accumulator) and use a small wire to jump the prongs on inside the plug for a few seconds. If the compressor starts it's low on 134a. You can use the stuff with dye as stated above and search for a leak. If you don't find one, then it's most likely the evap core under the dash. The dye won't help you in that location as the core can not be seen. In that case you need a leak detector.

 

You might also want to check the compressor relay in the PDC.