ANSWERS: 2
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Whe you say "stopped working" does the blower still work but with no heat or does the blower not even work at all? If the blower (fan) doesn't blow at all it's probably because the fan motor died, you'll need to buy a new motor (junk yard = 50% off or more). it should be easy to replace. If the blower blows air (at different speeds like it is supposed to) than the problem lies with the delivery of hot water from the engine to the heater core (where the heat for the passenger compartment comes from) The coolant lines from the engine to the heater core may be plugged or the heater core itself may be plugged. The best way to unplug them it to disconnect the hoses at the engine and blast water into one end of the line with a hose. before doing anything though check the the most simple things... 1. Check your fuses 2. make absolutely sure there is enough water (coolant) in the coolant reservoir and system
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The most common cause of these symptoms is a broken blend door. Check the HeaterTreater F150 ebay listing for diagnostic procedures or the web site at www.heatertreater.net cgallen
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