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.
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| ECV, ECV Diagnostics Aids/Tools. Latest R-134a Type News 04/10/2026 in the HVAC Forum ECV, ECV Diagnostics Aids/Tools. Latest R-134a Type News Do you need an ECV diagnostic tool? Why not just command an ECV with a scan tool and not buy a separate ECV diagnostic tool? Is the compressor you are testing, ECV "positive side control, or ECV "ne... | ||
| small cans of 134a 04/09/2026 in the HVAC Forum It's been so long since I used a small can that I didn't know they had seals in them. The last I knew you pierced it and were committed. I used one last year and the refrigerant was very slow to come out. I mean really slow. Is this normal or do I have to... | ||
| Compressor operation 04/03/2026 in the HVAC Forum [HVAC: 13 BMW X1 xDrive28i 2.0L] Having trouble with this compressor system. The compressor will come on most of the time(clutch turning), but no pressure. It has some sort of sensor/control valve mounted in the rear of the compressor housing. I am think... | ||
| TM31 with low oil level 04/02/2026 in the HVAC Forum I found a truck that had somehow had it's low pressure line loosen at the compressor. Miraculously there is still pressure in the system but oil left at the line to drip down the side of the block. There is no oil in the sight glass. After I replace the o... | ||
| Need Adapter for Nitrogen Testing R134a to R1234yf 03/27/2026 in the HVAC Forum We have a nitrogen pressure testing tool for ac that fits R134a. We are looking for an adapter fitting or hose so we can also use the tool to pressurize R1234yf systems. Is anyone aware of an adapter or hose swap? The easiest thing I can think of is a hos... |
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