blower motor resistor
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From: AL
blower motor resistor
I have a 2004 F250, base trim, has the 4 position HVAC manual fan switch. A year ago it had no low or med-low speeds. I replaced the blower motor resistor which had signs of melting. The blower motor worked on all 4 speeds after this. Now the low and med-low speeds are out again. I assume the resistor is bad again. Is this just a bad part or could something else be causing the resistor to blow? I didn't use a Motorcraft part, that may be my issue. I seem to have trouble with the parts store's brand electric parts.
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From: AL
Yes, I forgot to mention I replaced the connector. I was in a hurry and my local shop changed it while changing the oil. They use the "lifetime warranty" store brands. I'm going now to get a Motorcraft unit.
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From: AL
Well my memory is fading. I went to change the resistor and low and behold it's a Motorcraft part. I vaguely remember now that I took the part with me to the oil change place and their mechanic replaced it and a new connector. One of the resistor coils somehow contacted another coil next to it and fused the two together. Maybe the mechanic bumped the cools when he installed it. I separated the coils a little more on the replacement unit. I added dielectric grease to the terminals and connector. The connector was tough to remove.
Fleet Mechanic
Joined: Oct 2017
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From: Southwest Ohio
It is common for the connector to get stuck on the resistor. This is why you should apply some dielectric grease on the connector before plugging in. Most auto parts stores sell the connector with about 6-8” of wire for easy splicing.
— Dave
— Dave
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1987 - 1996 F150 & Larger F-Series Trucks
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May 17, 2004 11:01 PM
