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Heat only blows on high! Help!

565 Views 8 Replies 9 Participants Last post by  Fxsts12
So a few months ago, my heat started only blowing on high. I did my research and replaced the blower motor resistor. It fixed the problem, about two months later, it happened again, and I replaced it again. After about a week it’s now gone out again? What else could it be besides the resistor?
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Check the ground for the resistor and the blower motor. They will build corrosion and create resistance burning up your resistor. Had the same issue on my 04.
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