fan/heat - Ford Powerstroke Diesel Forum
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post #1 of 2 Old 01-21-2011, 11:44 AM Thread Starter
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i cant get my truck to warm up at idle no matter how long. i can get heat but the truck has to be moving and there is no difference when i have the setting on 1 or 5. the faster the truck moves the more steady the heat flow. whats the problem with the fan, no fuses are blown or anything.

1999 7.3L F-250
397000 Miles @ Last Check
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post #2 of 2 Old 01-22-2011, 06:12 PM
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Sounds to me like it is your blower motor resistor. It is mounted to the airbox just to the right of the blower motor and has 4 or 5 wires plugged into it. Cost around $20. If for some reason that does not fix it, then I would look at the blower motor.

99 F250 Super Duty Crew Cab 7.3 Powerstroke
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