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Heater controls on Bonneville stuck

Posted by dave_mn (My Page) on
Wed, Apr 4, 07 at 19:49

Its a 97 Bonny. The heater control is stuck on defrost. Where do I start to look?

Follow-Up Postings:

RE: Heater controls on Bonneville stuck

You have a vacuum leak on the controler

RE: Heater controls on Bonneville stuck

You may have lost vacuum to the actuators. Possible causes:
1. Vacuum line under the hood pulled off or cracked.
2. Vacuum reservoir cracked.
3. Vacuum line under the dash pulled off. (Maybe someone's foot kicked upward under the dash.)
4. Vacuum leak in the controller.
5. Failed vacuum actuator.

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