Question about 1997 Oldsmobile Aurora

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Heater only works when it wants to

I have a 1997 Oldsmobile Aurora the heater blower sometimes wroks, does not work, or works and then stops working. I dont know if the problem is a sensor, switch, or the wires. If the wires were would I start looking for the short.

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I took the fan out and tested it once I found out it worked the motor control module was the problem

Posted on Jul 09, 2012

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Could possibly be control head for heater/ac system. lots of gm vehicles have this problem.sounds like a loose connection, look under the dash on the right side near blower motor to check wires to blower motor

Posted on Nov 30, 2008


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The temperature display and the heater function are likely two different issues. I had a similar issue with intermittent heat on my 2001 Aurora. In my case it turned out to be the blower motor. As a vehicle ages and the bearings on the motor start going bad, the amount of energy it takes to spin the motor gets higher and higher. This can result in intermittent behavior or cause the heater resistors to go bad. It is also possible that the heater control itself is the issue, but with the age of this vehicle, I would start with the blower motor and then heater resistors.

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Could be the motor itself or the motor resistors. Many times if the resistors are going bad you will get the high speeds but not the lod speeds. THe Aurora might not work this way due to the climate control system. Another area could be the heater control too, but the common failures are resistor/motor.

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1997 Aurora heater fan won't work

So it's the blower motor, the motor resistor or the control unit. Typically the motor resistors fail, but the motors also fail. Try all of the speeds to be sure none of them work. Usually running on HIGH is the best test, because it has the greatest likelihood of turning the motor.

Jan 28, 2011 | 1997 Oldsmobile Aurora

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Jan 21, 2011 | 1995 Oldsmobile Aurora

1 Answer

Heater blower only works when it wants to.Is this the resister?

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