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?
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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