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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

71 Mustang A/C Freezing up
11/14/2017 in the HVAC Forum
[HVAC: 71 Ford Mustang Mach I 5.8L] This car came in, owner had replaced the compressor and expansion valve,wanted it recharged. Looks like a York type compressor, but its aluminum. It has service ports on the head of the compressor. Its a R134 system. T...
6 Days in my Shop.and still NO HEAT
11/12/2017 in the HVAC Forum
[HVAC: 06 Volkswagen Jetta TDI 1.9L] As a retired VW tech I still fix a few VWs at my home. This Jetta is owned by a nice young, polite lad. He does some work on it himself. He says that the cooling system has been acting strange all summer. The temp gau...
RPM/Revolution sensor tester?
11/02/2017 in the HVAC Forum
I thought I saw somewhere there was a tool/tester to test or bypass the rpm/rev sensor mounted in the rear of the compressors that used them. Has anyone seen this tool advertised?
609 Certification
10/26/2017 in the HVAC Forum
If a someone was certified in 1992, are they now, and will they still be in compliance January 1st 2018? Everything I have seen says yes. I am waiting for an email reply from MACS. Thanks!
2004 Expedition blend door
10/12/2017 in the HVAC Forum
Hi folks, We have a 2004 Expedition with standard AC. We believe the main unit blend door is broken and needs replacement. Our problem is finding one. The dealer says they are no longer available and no one shows them anywhere; this includes door or box. ...

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