Tag
#air conditioning
2 posts in Car Diagnostics blog about "air conditioning" — OBD-II diagnostics, DTC codes, repair. ← All posts
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Variable displacement AC compressor: why "new refrigerant" doesn't help, and how OBD sees a sick pump
Fixed vs variable displacement AC compressor, how to diagnose the control valve, code B1247, symptoms, and why "clutch not engaging" isn't always an electric fault.
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AC not cooling: OBD-II diagnostics, refrigerant pressure, compressor and sensors
What OBD-II shows about the AC system: codes B1234, B10DA, high/low-side pressure, evaporator temperature, why "just add refrigerant" isn't always the answer, and how to diagnose the compressor clutch.