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    How do I replace the heater/Ac heat sensor switch on a 2003 Ford Windstar

    0  Views: 520 Answers: 1 Posted: 12 years ago

    1 Answer

    Before checking the motor, check the relays under the dash, drivers side:one relay for the rear blower one relay for the front blower there are 14 black relays and one blue flasher unit that works with the turn signals and also flashes the 4 way flashers, its a dual purpose flasher unit.


    Check the relay diagram in the owners manual for the position of the correct relay.


    The other fault may be no low or mid range speed on the blower switch. If this symptom pops up, it is most likely the resistor unit which is located near the blower motor - also behind the glove box.


    Check for burned windings, bad connections, or check the over temp sensor for an open circuit with an ohm meter.


    My symptom was no front blower operation and after 3 hours found the problem of a bad relay contact - the coil was fine and i made the mistake of not making a diagram of all the relays and flasher unit before removing them, hence the long time repair.


    Also spray wd-40 on the relay contact pins for easy removal, as they are hard to remove - no room. I used pliers and be careful, as i pinched my fingers.


    Good luck in this repair



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