Hello, I am new at this (forums) and new here. I was wondering if anyone could help me out with a recent A/C problem. I had a qualified shop replace my evaporator, filter dryer, and various lines, and blower fan a year ago and my A/C was like a fridge right up until 2 days ago!

Worked great on the way to work and when I left work, NOTHING. A/C comp not cycling at all cannot hear it go on and off as usual, all blowers inside the cab work and all selections from the control panel seem OK. Just blows warm and no A/C. I checked the relay in the PCM and is OK, checks the obvious, belts, connections, etc... Did I lose gas and now the low limit switch is preventing the comp from engadging? That seems unlikely since it blew cold in the am and then nothing in the pm, but then again I have no clue! LOL Any help would be appreciated.
pg

 

buy a pressure gauge from advance and check the pressure yourself. the compressor needs to be on to get an accurate reading

 

Probably a failed low pressure switch. You can jumper the switch, and see if the compressor runs..... Verifying pressure is a good idea too.

 

thanks guys! I will get the guage and check for pressure if none i will re-fill the system and hope for the best!
thanks, again!
Pg