Truck is eating blower motor resistors. - Ford Powerstroke Diesel Forum
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Old 01-01-2012, 08:40 AM
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Truck is eating blower motor resistors.

Yea, new guy here.

I bought a 2003 F 250 FX4 with 121,000 miles. I love the truck but this thing is eating resistors like nobodys business. Sometimes they last 10 minutes and this last one lasted about a week. The dealer is installing these because that was a stipulation when I bought it that they would fix the blower motor. I did a search of this forum and didn't find anyone with the same problem.

Here is a little info on it. The wiring looks good, no frays or splices. The connector is rust free and appears to be making good contact. thay are also putting the clear contact gel on the connections. The blower works fine. Doesnt have any weird noises or smells and works on all speeds until the resistor quits. Then - high only. The truck is stock and was a one owner North Texas truck with no reported accidents.

Any ideas on where to look next before the dealership starts to buck me on this?
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Old 01-01-2012, 09:04 AM
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Sounds like the blower motor itself might be drawing more current than it should and overtaxing the resistor. Has IT been changed?
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Old 01-01-2012, 09:07 AM
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Not yet but I can try to get them to.
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Old 01-01-2012, 10:58 AM
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The service manuals may state how much current the fan is supposed to draw. Maybe they can test it that way.
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Old 01-01-2012, 11:23 AM
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interesting, my truck is the same/very weak from 1-2-3 (hardly any air) and 4 is the only thing that works...
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Old 01-01-2012, 11:40 AM
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That is just the crappy little resistor. It is pretty easy and painless on the knuckles and the wallet. Most people replace the resistor and carry on. Not mine. It just burns up the new ones.
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Old 01-01-2012, 11:46 AM
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Change the blower motor. The blower motor is bad Ford is stalling....
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Old 01-01-2012, 12:14 PM
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yep, motor gets my vote. but you can always test to see how many amps it pulling while operating
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Old 01-01-2012, 01:22 PM
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check fuse for the blower motor..... if it is 15 amps and i think it is and you are pulling very close to that its the motor........ all auto parts houses sell a fuse amp meter they plug into the fuse location and read amps on the face of the meter.... i think about 15 to 20 bucks!!!!!!
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