I have a 2006 hummer3 and the heater works sometimes and sometimes it doesn't.could this be a short or the blower or something else?
does the knob have a short in it
how would I find that out. I was on my way to my mechanic and the heater worked all the way there. my son said it goes on and than after awhile it stops.
does the knob work on all the settings
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