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Re: Thrift-Air Heater issues... '64 C10
I would all so check all the wires going to the switch and all the wires to the resistor and the wire to the fan make shore that none are cracked and shorting out on any thing under
the dash.
All so if you have not all ready, check out the resistor.
the one in my truck was falling apart. (careful, I don't know what there made out of mine looked like it was asbestos but I don't know)
Like some others said it may be the fan motor take the motor out and see if it spins
freely, if not it could be causing the problem.
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