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by racer55 on September 16th, 2010

racer55

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no heat in ford f 150

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Answers. 2 helpful answers below.

  • by aiar on September 16th, 2010

    aiar

    so torch it - plenty of heat then

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  • by bagicide stayed 10 months too long on September 16th, 2010

    bagicide stayed 10 months too long

    Probably a bad thermostat. That is usually the first thing to check. If you run it with a bad thermostat, it will ruin your engine, and the part is cheap and easy to install. Run your engine for ten minutes or so and watch the heat gauge. If the thermostat is working, you should see the needle jump suddenly from 0 to 170 after about ten minutes. If your truck has an idiot light (and so many Fords do) then pop the hood and put hour hand on the top radiator hose after about ten minutes. It should suddenly get warm. Watch out for the fan, if you have to touch the hose. The fan will kick on a minute or two after the thermostat opens, and you don't want your hand in the way if you want to keep your hand.

    If the heater gauge doesn't suddenly jump and the hose doesn't warm up, then your thermostat is bad. This will quickly overheat your engine and blow your head gasket or crack the head or block. You need to replace it pronto.

    The thermostat is a simple valve consisting of a bi-metal spring, and it is usually located in where the top radiator hose connects to the engine. Taking it out is usually a simple matter of backing out two bolts, dropping the thermostat out (remember which way it goes), scrape the old gasket off the housing and the block (carefully), drop the new thermostat in (the right direction), put a new gasket on, replace the housing and turn the two bolts back in uniformly (preferably with a torque wrench if you have it).

    http://www.ehow.com/how_4590708_change-thermostat-ford-f150.html

    http://www.autopartswarehouse.com/details/QQFordQQF-150QQMotorcraftQQThermostatQQ1997QQMIRT1116.html?apwcid=P1135867996W43b3f85c7ab9e&apwid1LaJVH9

    http://auto.howstuffworks.com/question248.htm

    If the problem isn't the thermostat, then the heater core and the heater fan are the next most likely candidates. Check it and get back with me if it isn't the thermostat.

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