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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

06/10/2019 in the HVAC Forum
[HVAC: 09 Chevrolet C5500 Kodiak C5V042 8.1L] Anyone have HVAC wiring diagrams for the cab on this? Power and ground distribution wiring diagrams? Thanks.
06/10/2019 in the HVAC Forum
Group, Have not had to find a leak in one yet but the time has come. All of my injectors for dye are r134. looking for a solution to install dye into a yf1234 system. Yf1234 to r134a fitting? A dedicated kit (tracerline tp-8659) or other solution you have...
Ambient Air Temp Sensor Location Question
06/08/2019 in the HVAC Forum
What impact does the ambient air temperature sensor have on overall AC operation? Another forum that deals a lot with Navistar Prostars has a continuing A/C thread. In it the idea of relocating the ambient air temp sensor come up a lot. The consensus is t...
10 avenger ambient sensor location
06/05/2019 in the HVAC Forum
I just had a 10 avenger in with the p0073 stored, ambient sensor, and has no A/C operation. Scanner reads -54 for sensor. The car has manual A/C. Looked in ALLDATA, and MotoLogic to get location of ambient sensor. They show on power steering return lines,...
AC system noise on compressor cycle
06/05/2019 in the HVAC Forum
[HVAC: 08 Mazda 5 Sport 2.3L] This vehicle has a loud buzzing noise when the compressor cycles off for about 3 seconds, no noise when engaging. It is really noticeable in the cabin. It is like there is something touching the blower fan blades as the fan ...

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