Range Rover P38
HEATING AND VENTILATION
1
FAULT DIAGNOSIS
HEATING AND VENTILATION FAULTS
This section covers mechanical, fuse and possible
flap servo motor faults that could occur in the heating
and ventilation system.
Visual checks of components within the system and
relevant fuses should be carried out before
undertaking detailed fault diagnosis procedures on
TestBook.
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
inoperative servo motor.
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
inoperative servo motor.
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
to inoperative servo motor.
1. Renew servo motor.
2. Blown heating and ventilation
system fuse.
2. Check and renew fuses 8 or 17.
