Question about 1981 Ford F 150

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No heat 1996 f-150 pick-up

My son has no heat in his truck. We have changed theThermostat and flushed out and new anti-freze. At the time I also blew out with a compressor thru the two heater core hoses. Still no heat. The vent damper on the firewall works properly with the vacuum switch functioning to open and close the damper door. Still no heat.
Any help would be appreciated. Thanks

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  • lamrjm926 Jan 16, 2009

    Thanks, thermostat is new and the hoses are hot.

    Both hoses in and out of heater core are hot also.

    Still no heat.

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Check your thermostat , start the vehicle , turn heater on full - let vehicle run for a while - then grab the top heater hose - it should be warm if not - replace the thermostat, it may be stuck shut .

Posted on Jan 16, 2009

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