Does anyone else have problems with interior fan coming on when car turned off? on 2009 Mazda CX-9

Our CX9 involved in rear end accident. Now when car is turned off the interior fan comes on and runs for about 2 min before stopping. Have looked at some blog spots and found that the computer control module may need to be reset, but that mechanic cannot do it. Has anyone else had this issue?

Asked by for the 2009 Mazda CX-9