Ford: Heater fan either off or high - no in between

Ford: Heater fan either off or high - no in between

11-07-2009, 11:38 PM

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Blakers

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Join Date: May 2001 Location: Conneautville, Pa. N 41.7625 W 80.26865 (NW corner) Posts: 2,353 Old Reader's Rigs Gallery

Ford: Heater fan either off or high - no in between

Hello Folks,
Once again I come to you asking for help with my company work truck. It's an 06 F-250. A few weeks back the heater fan control stopped working except on high. All the other positions are dead. I was told it was probably the heater fan resistor, located in the air box near the heater core. I took it out and looked at it - all the resistor coils look intact, but have some heat discoloration, which is probably normal. Is there a way to test these with a volt meter or ohm meter. Could it be the switch bad instead?

Thanks for your help,
Blake

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