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Re: heater not working at all
The blower motor more than likely has burned out....that is assuming its the blower your talking about. They get pretty hot if run on high constantly. Bout all you can do is replace it....what about the warranty?
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Hello! The Blower Motor Resistor Pack (see picture below) Which is bolted to the top of the blower motor assembly has a loose connection at its connector or in the component assembly...Check for dirty contacts on both male/female connector pins...Pull the resistor pack and inspect for broken or loose connections...Cost is around $30...AC Delco part #1580647...Guru...Saailer
SOUNDS LIKE A FAULTY HEATER RESISTOR..LOCATED UNDER DASH ON PASSENGER SIDE..PICK UP A NEW ONE..EVEN FAIRLY CHEAP FROM DEALER..YOU MAY HAVE TO TRIM OPENING WITH AN UTILITY KNIFE TO GET NEW ONE IN..FAIRLY COMMON PROBLEM..THE WIRING CONNECTOR TO IT MAY BE DAMAGED ALSO..MELTED FROM EXCESSIVE CURRENT DRAW..YOU MIGHT NEED A BLOWER MOTOR AS WELL..MAY CAUSE CONNECTOR/RESISTOR DAMAGE
There is a resistor block in the heat duct that controls fan speed usually when these go out the fan will quit on one speed but work on others until finally all speeds quit,also there is a relay that powers the fan it is under the hood in the relay box