heater fan

[fishhotrodfish]

1997 ford power stroke heater fan only works on high?

[fordnut85]

Sounds like a bad ballast resistor to me. Good thing is they are cheap (like $20)

[adfields]

Could also be the switch in the dash, also not big bucks.

[fishhotrodfish]

Thank you very much. Where would the ballest resister be?

[adfields]

Originally Posted by fishhotrodfish

Thank you very much. Where would the ballest resister be?

Look at the heater fan and just to the motors side of the fan you see a multi wire plug, that's it.