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Thread: Heater works fine for about 30 minutes then runs cool

  1. #1
    Join Date
    Jan 2007
    Location
    Thousand Oaks, CA
    Posts
    118

    Default Heater works fine for about 30 minutes then runs cool

    As the subject says the heater in my 2001 P38a runs funie for about 30 minutes then starts to blow cool air into the vehicle. The TestBook sysmbol is not showing in the display and otherwise the system runis fine.

    Also, the pollen filters are fine.


    Any ideas?


    Thanks


    Paul
    1971 109 Safari Wagon (1 ton chassis)
    1995 LWB Range Rover Classic
    1997 Defender 90 (repaired at last)
    2001 P38A Range Rover

  2. #2

    Default

    PVKD,

    I assume your coolant level is ok? Our '99 would blow warm under load but when idling (or cruising down a hill) it became cold. We had a bad head gasket and had leaked enough coolant to affect the flow through the heater core.

    Just a thought

    Greg Haugen

  3. #3
    Join Date
    Jan 2007
    Location
    Thousand Oaks, CA
    Posts
    118

    Default

    Yes, the coolant level is OK and the thermostat was changed sometime again by the dealer and believed to be working correctly.

    Thanks
    1971 109 Safari Wagon (1 ton chassis)
    1995 LWB Range Rover Classic
    1997 Defender 90 (repaired at last)
    2001 P38A Range Rover

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