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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

Heater core flushing
01/11/2025 in the HVAC Forum
[HVAC: 02 Ford Expedition XLT 5.4L] Has anyone found a heater core flush that is effective ? A procedure , an additive , anything to keep from replacing a heater core . I know it is necessary to replace a heater core when the job is less than 3 hrs. That...
No defrost
12/03/2024 in the HVAC Forum
[HVAC: 20 Ford F-550 Super Duty 6.7L] Hello We have a 2020 ford f550 6.7 PS, no air flow through the Defrost vents , Al other functions work , and blend air door Works properly. The HVAC panel illuminates for defrost function. Thanks for any thoughts Jim.

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