Quote:
Originally Posted by ronaldk
It has nothing to do with temp. If you shut your air conditioner off and your veh is cold and the fan runs you have a problem, if fan stays off but when you put air back on the fan runs thats normal. The fans will come on without air being on should eng start to get hot. But hot or not if you turn on air conditioner the fan is meant to come on.
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Original poster said, "Found that the fan runs all the time when the heater is set to defrost."
I said that it will run if the heater is set on defrost if the outside temperature is above a given threshold... ie 42 or so degrees. In this case the outside temp does make a difference. Maybe I should have said "outside" temp..