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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| 2023 Silverado Compressor & AC ystem 08/26/2025 in the HVAC Forum We had this 2023 GM truck that had very poor cooling ,especially in the afternoon & 95+ temperatures. I has the "variable" compressor. The command to the compressor valve was 100%, the high side was 160 or so and the low side 80-100 at times. Seems like a... | ||
| Orifice Tube clogs documentation 08/13/2025 in the HVAC Forum Does anyone know if anyone documented clogged orifice tubes and what was the root cause. Seen some yellow, green, charcoal, etc. Wondering what is attributed to the colors, if contaminated refrigerant causes this, etc. Just curious. Web searched failed...... | ||
| 87 Corvette noisey R4 compressor 08/04/2025 in the HVAC Forum Good Morning, Belongs to my good neighbor did him a favor and overhauled his AC , new 4S comp. accum, X tube, flush evap-cond, Pag , convert to 134A about one year ago, compressor made a slight rattling noise which over the years have seen many times,(wit... | ||
| Evaporator core replacement 07/26/2025 in the HVAC Forum [HVAC: 16 Volvo XC60 T6 2.0L] We are looking into replacing the evaporator core on this vehicle. I was kind of surprised to see that AD calls for only 3.8 hours? It shows some kind of a alternative way to change it dealing with cutting some heater hose p... | ||
| R-290 Refrigerant 07/22/2025 in the HVAC Forum R-290 is currently in development for use in many automotive applications. It has a very low GWP of 3 R-1234yf has a GWP of 4 R-744 has a GWP of 1 R-152a has a GWP of 124 and is approved as a low GWP refrigerant Ford had petitioned the EPA for approval to... |
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