Possible Causes
- REAR FAN SENSE SUPPLY CIRCUIT SHORTED TO GROUND
- REAR FAN SENSE SUPPLY CIRCUIT SHORTED TO REAR FAN SENSE RETURN CIRCUIT
- REAR FAN SENSE SUPPLY CIRCUIT OPEN
- REAR FAN SENSE CIRCUIT SHORTED TO GROUND
- REAR FAN SENSE CIRCUIT SHORTED TO REAR FAN SENSE RETURN CIRCUIT
- REAR BOOSTER FAN REAR CONTROL SWITCH
- AUTOMATIC TEMPERATURE CONTROL (ATC)