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Q: heater blower switch on 1994 Ford Tempo

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hello, i recently noticed the heater blower switch under the dash gets hot after turning on the blower and I even saw sparks at the base of connection. I am assuming I have to repalce the harness switch all together? I found out about this after noticing a faint cable burning odor while air was on. i wonder if this was a factory problem?
(1) Answer
The component that you may be looking at is the blower motor resistor and they do wear out. They are easily purchased and don't really cost much.
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