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#climate diagnostics

1 post in Car Diagnostics blog about "climate diagnostics" — OBD-II diagnostics, DTC codes, repair. ← All posts

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.
July 16, 2026

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