I'm not even sure where to start.. all I know is the compressor is not cutting on! . Could this be because low charge? Or should I go right to the compressor clutch? I notice no difference in idle when turning the A/C or heat on, and I definitely can't hear it cut on, so that's why I'm assuming that it isn't cutting on. Halp?

 

they have a low pressure switch on compressor that when pressure gets low keeps it from running. prob just low

 

If it is low.. it'd be because of a leak somewhere, right? It should keep pressure almost indefinitely unless it's leaking somewhere, right?

 

somewhat true but could be slow leak. i would get a can of dye, oil , stop leak and freon all in one can.

---AutoMerged DoublePost---

you can jump across wires that goes on switch to see if clutch engages

 

Sweet, thanks pap, really gotta get the A/C working.. god a lady friend coming to visit haha.

 

The 94-02 trucks are notorious for the A/C evap cores failing.Do the dye test or have a good A/C shop use their sniffer to see if thats where you leak is at.

 

i know when i had mine done there was no leak anywere that they could detect and i had the same problem. what i did on mine was route a jumper switch to the control switch. i ran it into the high pressure switch befor running it to the pump clutch switch. this way if the pressure gets to high it automatically turns the pump off

 

Ive got an 06 5.9l and the A/C stopped working today. its just blowing hot air. I checked the clutch and its not even engaging. it ran fine before then just quit. I checked the fuse/relay box and only found 1 hvac fuse and its fine. I tried to add, but the cheap guage I have read over 100psi and wouldnt recieve anything from the 134 can.

Any help is appreciated

 

If i was working on it the first thing i would do is to check if it was low pressure causeing the problem or something else. There is a pressure switch on the accumalator and if the pressure gets to low it woulnt let the clutch kick on so i unplug it while its running with the a/c on and stick a paper clip in it and if the clutch kicks on then you know it was the pressure and if it dosent then you have some more searching to do like a relay or some wireing or the clutch itself.

 

Hi tye haha