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Automotive HVAC Forum

Professional automotive forum for discussion of heating, ventilation, and air conditioning maintenance and repairs. Includes discussion of refrigerants, refrigeration lubricants, system analysis and diagnostics, filtration, HVAC-specific tools & equipment, best practices, and more. This forum is for experienced automotive repair professionals only, membership required.

Continue to the description of our next automotive discussion forum, the Technical Discussion Forum.

Recent Automotive Discussions in the Automotive HVAC Forum

bitten by a schrader valve
10/30/2020 in the HVAC Forum
Just finished diagnosing a problem that reminded me to never forget the basic's, 2011 GM luxury vehicle that uses a pressure transducer/sensor to regulate compressor solenoid,sensor had 5v ref signal and ground, but no voltage output to ECM, after being s...
Know a module rebuilder rear auxiliar module Auto AC
10/28/2020 in the HVAC Forum
[HVAC: 02 GMC Yukon SLE 5.3L] Hello fellow HVAC gents.. First time poster in this forum. I am having quite a hassle trying to find a discontinued GM part # [...] and pretty much given up on locating one new. What I am after is possibly a rebuilder that w...
Bad compressor?
10/26/2020 in the HVAC Forum
[HVAC: 04 Jaguar XJ8 4.2L] This is my wifes car. The AC system just stopped cooling. The low pressure is around 70 and climbs when you rev the engine up. It has around 200 on the high side. This is a full time engaged variable displacement compressor res...
Mode door sticking
10/16/2020 in the HVAC Forum
[HVAC: 13 Chevrolet Malibu LS 2.5L] This a tip for those of you out there having to deal with replacement of mode door levers behind the cam gear. The new GM part is an updated version more robust than the original which was a piece of junk. What I have ...
MT3700 PRESSURE TRANSDUCER TESTER
09/29/2020 in the HVAC Forum
Anybody use this tester, Omega says it's discontinued, but wondering if the tool was useful.

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