Question about 1989 Oldsmobile Cutlass Supreme

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Can't turn off the heater

I have an 89 olds cutlass and my heater will not shut off. I looked for the fuse didn't see one. Does anyone know how to turn off or unplug the heater? if I could put it on a switch I would. Now that it's getting warm out it's really getting on my nerves. My windows wouldn't roll down either but I fixed those! Anyone know?
John "Cooked Alive"

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  • cruzrider03 May 30, 2009

    to clarify my 89 olds heater problem, I can't turn off the blower
    motor, and the temp is always very warm/hot. I turn every button off
    and it still blows hot air. Now, I can turn the blower up but it never
    shuts all the way off.

  • yadayada
    yadayada May 11, 2010

    do u mean the air blower motor?



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Plug is on the fan under the hood

Posted on Mar 20, 2010


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Can't turn the heater off.

If none of the controls on the heater/AC panel are working, then you have a vacuum problem and the default position is the heater setting. There's a diagram of the vacuum system on a label on the front under the hood just in front of the radiator. It's a very simple system so don't be overwhelmed.
If the label is gone, go to your local library and check the Chilton's manual.
Your system must have vacuum to the switches for any kind of control. Be carefull of the small vacuum lines under the hood. Most at this age are very brittle.
Hope this helps, Rick.

May 29, 2009 | 1989 Oldsmobile Cutlass Supreme

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Fuse box

Under the left of the dash board close to the parking brake tucked up under.

Jan 02, 2009 | 1989 Jeep Wrangler

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89 olds cutlass supreme

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