Question about 1997 Ford F150 Regular Cab

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Heater fan will only blow on high . have replaced switch and checked all wires . worked fine had core replace thats when this started

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  • Ford Master
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Hi:
You need to find and check one more component. The most likely cause is your heater motor resistor assembly. It is usually mounted in the heater box assembly, under the right side of your dash. and has an electrical connection on it. If it fails, or isn't connected properly, all you will get is high !
Hope this helps!

Posted on Oct 14, 2010

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