Question about 2003 Pontiac Grand Am

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The blower on my 2003 Bonneville won't blow out the floor.

It will blow out the dash. It just quit blowing out on the floor. What could be the problem? Thanks.

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  • Pontiac Master
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85% chance its a problem with the blend motor (a small vacuum device that opens and closes a door in the heater to direct airflow) The part itself usually looks like a small can with a vacuum hose on one end and a little arm that connects to a lever sticking out of the heater box. (some cars have two) To check, watch and see if the lever moves in response to control position changes (check on Heat and AC) If no movement is observed at any time, it's probably bad. After removal, try to move the arm on the box, just to be sure it is not jammed. I have removed everything from pencils, toys and even a small bag of **** from inside heaters, while I was in the business!!

Posted on Dec 30, 2008

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  • Master
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The vents are controlled by doors that operate on a vacuum. There are small hoses that go to each vent door and provide the required vacuum to work the door. If the hoses fall off or become leaky, the door can't be opened when you move the control on the dash.

You will need to look under the dash and check the condition of the hoses. Make sure you check both sides, as only one side may be affected. (there are usually 2 different vent doors for the floor area)

Posted on Dec 30, 2008

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