landrover Workshop Repair Guides

Land Rover Workshop Service and Repair Manuals

80 - HEATING AND VENTILATION|REPAIR > < HEATING AND VENTILATION UNIT|Page 978
Page 656
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HEATING AND VENTILATION

1

FAULT DIAGNOSIS

HEATER OUTPUT

Symptom:-

Heater emits cold air.

1. Engine running: Check coolant valve opens as a

temperature control is moved from COLD.

2. Check for engine running cold.

See COOLING

SYSTEM, Fault diagnosis, Engine Runs Cold

3. Check heater pipes and hoses for blockage or

restriction.

4. Check heater matrix for blockage or restriction,

flush system.

Heater emits warm air.

5. Engine running: Check coolant valve closes

when both temperature controls are moved to
COLD.

80 - HEATING AND VENTILATION|REPAIR > < HEATING AND VENTILATION UNIT|Page 978