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Wht does my heater still have hot air coming out even when it is turned off?

(1999 GMC Jimmy)
in Millbrook, AL on December 14, 2011
My heater works fine, but when I turned it off today hot air still came out. The blowers were off and all dials turned off.
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Popular Answer
on December 14, 2011
the mode door may not be closing when commanded. you need to find the door and see if it closes when turned off.

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