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1998 GMC Jimmy Question: No heat, no switch sound to control for temp is activating anything.

 

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scooter215, Elizabeth, CO, December 04, 2011, 15:22
 Rookie

Air flows to all areas when control knobs are turned. No change in air temp, heat is going to the core.

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  • Answer #1

    December 04, 2011, 18:03
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     Master

    You most likely have a bad blend door actuator. You need to do proper diagnosing by a qualified tech.

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