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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

Refrigerant R134a
05/27/2017 in the HVAC Forum
Please advise, I was not aware there is any reason(s) other than heavily condensed refrigerant to remove and replace it completely in a automotive air con system. I thought recovering, cleaning, drying (filtering) the refrigerant was acceptable and then t...
Memorial Day Condenser Test for Fun
05/26/2017 in the HVAC Forum
Memorial Day Condenser Test for Fun Here is an easy test if you are an iATN Certified Technician! Technician A says that the A/C line connected at the very top of the condenser is always the inlet into the condenser. Technician B says that the very top of...
vaccum time
05/23/2017 in the HVAC Forum
Hi tecs. Can i have your opinion about how long holding vaccum it takes to conclude that the system is properly sealed and there is no leak? I read my notes of my old formations and it says " Observe the needle so that it does not rise for two minutes" 2 ...
2 Oz!
05/23/2017 in the HVAC Forum
2001 Lincoln Navigator 180 inch stretched limo. Blew the High Side hose. AC was in use when it ruptured, along with a very quick loss of all refrigerant. Contacted vehicle owner to get in touch with coach builder to determine how much oil should be in the...
4Seasons Tip - Discharge Line - Filter Inside Muffler/Damper
05/21/2017 in the HVAC Forum
Tip - Restricted Discharge Line - Filter Inside Muffler/Damper Copy and paste into browser: 4s.com/media/4914667/-AB348-Restricted-Discharge-Line.pdf Glenn (H).

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