a/c doesn't work


Asked by Apr 15, 2016 at 03:55 PM

Question type: Maintenance & Repair

2012 ram 3500 6.7 non-dually. a/c worked great.  Turned the a/c off and went into the store.  A/c hasn't worked since.  The comp clutch engages, the lights on the climate control knobs are on, but the a/c doesn't blow cold. Any ideas?

3 Answers


Do you hear the blower running? If so it could be a stuck blend door in the heater box.


Let the compressor run for a couple minutes, open the hood (be careful) locate the AC lines touch and see if one is cold suction / low side or if the pressure / high side is hot ... If the lines not cold you lost your R134a Freon.. Normally the compressor will not engage if the system pressure is to low. Now if the line is cold and the compressor runs the issue is in the cab try cycling through all the vent positions.


Thank you for the help brothers. I will check all of these and let you know what I find.

Your Answer

Add photo

Related Questions

  • a/c doesn't work 3 answers

    2012 ram 3500 6.7 non-dually. a/c worked great. Turned the a/c off and went into the store. A/c hasn't worked since. The comp clutch engages, the lights on the climate control knobs are on, but the...

    Maintenance & Repair

  • Why doesn't my a/c work? 7 answers

    I have a 2002 hyundai sonata and when I turn the a/c or even the heat on nothing comes through the vents at all. Please help!

    2002 Hyundai Sonata GLS


    Maintenance & Repair

  • 2003 Saturn Ion 2: My a/c doesn't work on settings 1, 2, &3 2 answers

    I got in a wreck and it almost hit the radiator, but that's it. A couple days after the wreck my a/c slowly stopped working. I thought I busted a line, but it was like my switch didn't work. I can...

    Maintenance & Repair

  • Why doesn't my temperature gauge or my a/c fan work after replacing sensor on water pump? 5 answers

    I replaced the sensor on my water pump after it was over heating everything went well but now my a/c fans won't kick in and my temperature gauge doesn't work. I tried buying a new sensor thinking it...

    2003 Ford Explorer


    Maintenance & Repair

  • Can I recharge my a/c if the blower's high setting doesn't work? 2 answers

    The instruction video said turn blower to "high". My high setting doesn't work. Can I still use the recharge kit?

    1999 Ford Escort


    Maintenance & Repair


Search Maintenance & Repair Questions

Maintenance & Repair Experts

#1 Tom Demyan
Tom Demyan
Reputation 175,030
#2 dandyoun
Reputation 93,610
#3 tennisshoes
Reputation 76,140
View All

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.