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Why does My ford fiesta heater switch only work on setting 4

Heating is only warm

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Odds are it is the blower motor resistor usually located somewhere in or under the dash inside your car. If you are friendly with your Ford dealer service counter guy he will look up where it goes for you. It is not labour intensive so the dealer should do it for a minimal charge if you don't want to be bothered..

Posted on Nov 19, 2013


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You need to look underneath the dash. Find the wires (4 of them) that goes into the blower box. They are very thin and corrode with time. You might even see some melted plastic bits as these wires are too thin and overheat.

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Sounds like the heater control valve/ blend door. The actuator may be stuck or broken. The actuator opens and closes to adjust for the heat setting in the car. You might be able to take a coathanger and manually open the door if you can get to the control arm. They are usually hard to get to and pretty expensive. It is located under the dash at the heater core box. Good luck.

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