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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

Flow Control Valve
05/22/2018 in the HVAC Forum
[HVAC: 11 Toyota Sienna LE 3.5L] AC will not engage compressor or show request on scanner, walked through system with Identifix and it appears the Flow Control Valve voltage is out of range at 3.6v, preventing amplifier from giving AC request. First time...
A/C Oil
05/19/2018 in the HVAC Forum
[HVAC: 95 Buick Roadmaster Limited 5.7L] Hello, I am replacing the ac compressor with dryer and orifice tube, compressor manifold lines to compressor. Need to know if I am correct in amounts of oil to install in components. The hold system calls for 8oz,...
Tek-Mate question
05/09/2018 in the HVAC Forum
My trusty Inficon tek-mate has never been serviced after all these years, and still works, but is not as sensitive. I was going to order up a new sensor, and some filters, but I see they have a generation update, (same part number). Is it worth it, or sho...
HVAC will not switch to cold
05/09/2018 in the HVAC Forum
[HVAC: 01 Mercury Sable LS Premium 3.0L] My tech has diagnosed it as a remote climate control module failure. Does this module need to be programed? TIA.
Condenser coil cleaner
05/09/2018 in the HVAC Forum
What are good chemicals to use to clean condenser coils? I especially need to clean tractor Condenser coils that get dirt, grass, and some oil that gets caught in the fins. The condensers are aluminum and the radiators are usually copper. I am worried tha...

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