Heater stopped working, blowing fuses, melted the wire connector

[toolboxchev]

Originally Posted by LockDoc

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I would replace the switch too. I would also check the heater resistor located in the heater duct. (follow the wires to it) It may be shorted inside. I can't remember if the screws are 1/4" or 5/16", 5/16" I think. Careful when you remove it, the wire coils are pretty fragile.

A heater motor that is dragging or squirrel cage that is full of mouse nests might cause the electrical components to overheat too.

LockDoc

X2 on that, also if the motor is older and electrically worn it will pull more amps to keep it working and do exactly like blowing fuses.