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Home >> Mitsubishi >> 2014 >> Lancer ES Sportback >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Heating, Air Conditioning & Ventilation - With Diagnostics - Lancer >> Manual A/C Diagnosis >> Diagnostic Trouble Code Procedures >> DTC B1021: Fan Dial SW Error < Vehicles without A/C > >> DTC Set Condition

DTC Set Condition

DTC B1021 will be set when the heater controller assembly (A/C-ECU) cannot receive the signal of blower knob.

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