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    My Vehicles

    1970 Cadillac Deville 7.7L 4BL 8cyl

    My Store

    405 N COLLEGE ST
    (479) 443-4043

    OPEN 'til 9:00 PM today

    SAVE 20% + GET A $10 GIFT CARD ON ONLINE SHIP-TO-HOME ORDERS OVER $100.

    Use Code: FALLBACK

    See Details

    Heater Control Valve

    Inspect/Replace

    The heater flow can be checked by feeling the hoses at the inlet and outlet to the heater core. If the heater has a control valve and it is open, both hoses should be warm. This indicates that coolant is flowing through the heater core. If the outlet hose is cold, there must be an obstruction in the heater core or control valve.

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