BLOWER FAN RESISTOR

2003 Ford Focus

Tiny

Mack62

July, 15, 2014 AT 4:34 PM

The blower fan on my 2003 focus was only working on the highest setting, so I set out to replace the resistor. I plugged into the new unit and checked. The lower speeds now worked but within seconds, the resistor unit was extremely hot./And it burned my fingers. I checked the the part number and it was correct. Then tried another resistor and had the same results. Both of these resistors were new. Any ideas? Thanks

FOUND 854 RELATED QUESTIONS

2 Answers

Tiny

CJ MEDEVAC II

July, 15, 2014 AT 5:19 PM

THAT'S HOW THEY LOWER VOLTAGE

THE RESISTANCE IN THE WIRES MAKE'S 'EM GET HOT

IN MANY CASES, THE RESISTOR IS INSTALLED IN A DUCT SO THAT THE PASSING AIR WILL COOL 'EM OFF

MAKE ANY SENSE?

THE MEDIC

Tiny

Jacobandnickolas

July, 15, 2014 AT 10:34 PM

Make sure the blower motor isn't drawing too many amps. That is a common cause of the resister going bad in the first place.

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