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.
| Mahle R1234yf temporary o2 sensor bypass 08/13/2026 in the HVAC Forum my machine just locked it self out because it says the 02 sensor has expired. Nice heads up Mahle! Is there a work around or bypass i can do until a new sensor arrives which is 1 week out? | ||
| Liquid cooled condensers 08/11/2026 in the HVAC Forum [HVAC: 19 BMW 430i xDrive 2.0L] We recently had a 2019 BMW 430i x-drive in for a/c inoperative. The vehicle has an ICE engine, not hybrid, PHEV or EV. and uses R1234yf. The a/c system was not only empty, but was actually in a vacuum. The owner said it ha... | ||
| A/C problem, or customer expectations? 08/06/2026 in the HVAC Forum [HVAC: 08 Lexus RX400h 3.3L] Good morning, fellow techs. I am all but certain the issue isn't really an issue at all, but I'm open to suggestion. Last week was pretty much the hottest of the summer. Temps around 115. The customer wanted me to check to ma... | ||
| Mahle ROU250 07/30/2026 in the HVAC Forum Looking for a simple recovery system-- This Mahle rou250 looks pretty basic/simple. Has anyone got any experience with this unit or other comments? Thanks! | ||
| Leak detectors 07/16/2026 in the HVAC Forum Just curious as to what everyone has found to be the best electronic refrigerant leak detectors? |
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