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1968-Present E-Series Van/Cutaway/Chassis Econolines. E150, E250, E350, E450 and E550

FAN SWITCH

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Old May 31, 2014 | 09:53 AM
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FAN SWITCH

I have a 2004 E450 Super Duty Diesel . What would cause the heater fan switch to get so hot that it melted a hole in the switch ??
 
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Old May 31, 2014 | 10:56 AM
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JWA
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An over-current situation has caused your switch issue---I've had the same thing happen but not to that extent.

In my case the blower motor itself was fine however the switch and its wiring harness connector had both nearly melted---I was shocked they could even be separated. A new switch and repair pigtail spliced in and nary a problem with it some 4-5 years later.

HTH
 
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