Why does air still blow through my vents when the car is turned off? on 2006 Pontiac G6

When I remove the keys & the car is no longer running sometimes the car will still blow air through the vents, not continuously but off & on.

by in Supply, NC on July 19, 2012
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1 answer 1 comment
ANSWER by , July 19, 2012
GM has added relays to the blower motors of some models to prevent a mildew smell. The fan will blow for 3-5 minutes to dry the evaporator core when you shut the car off. It is normal.
COMMENT by , August 08, 2012
I can go out to the car & get something a hour or two later & it is still sometimes blowing.