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Q:

blower motor fan on 1993 Oldsmobile Cutlass Ciera

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My blower fan motor stopped working when I changed temperature level from cold to hot. I checke dteh fuse and it is not blown. What is the most probable cause and easiest way to troubleshoot the problem. Relay, resistor, blower motor?
(1) Answer
Do you have an automatic control feature, or is just manual heating and air conditioning?

If it's manual, then you may have a faulty resistor or blower motor. If it's automatic, it could be some other automatic control component.