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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

Photo of Desiccant Restricting a Modulator Condenser Passage
05/02/2024 in the HVAC Forum
Photo of Desiccant Balls Restricting a Modulator Condenser Passage There are many circumstances that play into each situation. Even though I or someone else says it can never happen, the next thing that usually happens is, what can never happen . . . happ...
A restriction in the condenser can not be the cause
04/25/2024 in the HVAC Forum
It is often suggested that the cause of the A/C problem is a restricted condenser. It can not be the cause and replacing the condenser for an internal restriction will not repair the vehicles A/C system. If you think that you have repaired an A/C system b...
Just wondering if you can
04/23/2024 in the HVAC Forum
Hi to all. Got a nice 79 Chevy with a working r12 system. I have a few small cans they'll bury with me if I don't put them to use soon. Being in the shop overnight, the system is close to 60 degrees and has a static pressure of 32 degrees F. I was wonderi...
Machine reccomendations
04/17/2024 in the HVAC Forum
Another fleet asked me to recommend A/C machines, this would be 134A only, any thoughts good or bad? What to avoid? The tech there is fairly new to A/C work. Thanks in advance.
R1234yf dye injector
04/08/2024 in the HVAC Forum
Started seeing more of this R1234yf stuff here. Not sure why we haven't had more, but maybe we just get "junk" stuff here. Anyway, I like to use the dye for leak detection when I can-I don't have a problem getting the customer to come back(small town). Wh...

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