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HEATING AND VENTILATION 1 FAULT DIAGNOSIS HEATING AND VENTILATION FAULTS This section covers mechanical, fuse and possible Visual checks of components within the system and Symptom - Heater Emits Cold Air Only, Driver Or Passenger Sides. POSSIBLE CAUSE REMEDY 1. Engine running cold. 1. See COOLING SYSTEM, Fault diagnosis. 2. Heater pipes or hoses blocked. 2. Clear or renew heater pipes and hoses. 3. LH or RH temperature vent flaps in closed position due to 3. Renew servo motor. 4. Blown heating and ventilation system fuse. 4. Check and renew fuses 8 or 17. Symptom - Heater Emits Hot Air Only, Driver Or Passenger Sides. POSSIBLE CAUSE REMEDY 1. LH or RH temperature vent flaps in open position due to 1. Renew servo motor. 2. Blown heating and ventilation system fuse. 2. Check and renew fuses 8 or 17. Symptom - Heater Emits Hot or Cold Air To Demist Only. POSSIBLE CAUSE REMEDY 1. Heater distribution vent flap locked in ’demist’ position due 1. Renew servo motor. 2. Blown heating and ventilation system fuse. 2. Check and renew fuses 8 or 17. |