Range Rover P38
82
AIR CONDITIONING
NEW RANGE ROVER
6
FAULT DIAGNOSIS
Symptoms - Low Suction Pressure
POSSIBLE CAUSE
REMEDY
1. Expansion valve sticking or
closed.
1. Clean or if renew if necessary.
2. Moisture freezing in expansion
valve orifice. Valve outlet tube
will frost while inlet tube will
have little or no frost.
2. Fit new receiver/drier, evacuate and recharge system.
3. Debris restricting external air
intake grille.
3. Clean air intake grille.
4. Blocked air inlet housing filters.
4. Renew air filters.
5. Defective blower motor/s,
blown fuse/s or loose electrical
connections.
5. Check and renew fuses 42 or 43, tighten all relevant wiring
connections or renew blower motor/s.
Symptom - Noisy Expansion Valve (Steady hissing)
POSSIBLE CAUSE
REMEDY
1. Low refrigerant charge.
1. Test system for leaks; renew components as required.
Symptom - Insufficient Cooling
POSSIBLE CAUSE
REMEDY
1. Expansion valve not operating
efficiently.
1. Renew expansion valve.
2. Low refrigerant charge.
2. Test system for leaks. Evacuate system and renew components as
required. Recharge system.
3. Compressor not pumping.
3. Renew compressor.
