Ac Delco 15-73322 Heating/Air Conditioning Controller

ACDelco 15‑73322 is a GM OEM heating and air‑conditioning controller panel that translates cabin temperature and mode selections into blower fan speed, blend door positions, and heater core operation. Common failures on this model include burnt or tripped relays in the control board, degraded input signal from the climate control module, and corrosion of the internal contacts due to humidity or vibration. First‑check diagnostics: verify power supply voltage at the panel terminals, inspect all relay coils and contactors for continuity and physical damage, and review any diagnostic trouble codes (DTCs) stored in the vehicle’s ECU that reference HVAC faults.[oss-gpt-20b] Post Comment

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