Question about 1989 Ford Ranger

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Heater will not work, how do I fix this? I have changed the thermostat and the water pump.

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  • jhelton368 Jan 02, 2011

    yes, did all that...exactly like you said.

  • jhelton368 Jan 02, 2011

    well the heater core is the only thing not changed. Time to change that I guess. Thanks for all your help. I will check the thermostat before I do all that.

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Check heater control valve. Usually inline one of the heater hoses

Posted on Jan 02, 2011

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  • jhelton368 Jan 02, 2011

    did that...still no heat.

  • Mical Caterina
    Mical Caterina Jan 02, 2011

    Have you replaced radiator cap? If it's weak it won't hold pressure and will cause it to run cold. Are you getting warm/hot water at radiator fill neck when car is running and is radiator completely full? Don't mean to sound strange but have to ask.

  • Mical Caterina
    Mical Caterina Jan 02, 2011

    the only thing left is possible heater core clogged. At a rare chance you might have a bad thermostat - stuck open. Rare but it happens. There's not a whole lot left, it's a pretty simple cooling system.

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