Question about 2004 Ford Focus
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Posted on Jan 02, 2017
You'll need to check the voltage coming out of the switch. If it proves to be okay than you'll have to replace the resistor block in the heater box, this is a small rectangular black plastic plate with four wires connecting to it. It should be located under the hood on the passenger side firewall. Remove the two 5/16ths retaing screws and remove the block. To replace reverse the order given here. Thank you, Dana
Posted on Nov 15, 2009
Testimonial: "thank you very helpful info "
Sorry....No good news on this problem.
The resistor is built into the blower motor and can NOT be removed
You are going to have to replace the motor
Best of luck
Posted on Dec 17, 2009
check the wiring to the reostat (the resistor that controls the fan speed) also check the reostat has not burnt out. (the reostat should be near the heater motor housing)
please let me know if this helps
big mike :)
Posted on Jan 04, 2010
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