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Old 01-30-2018, 01:22 PM   #1
Join Date: Jan 2018
Posts: 1
Heater Problem

When it's sub 0, my 2002 Saab 9-3 conv. blows hot air through the vents and floor. As soon as you switch to defrost, it blows outside sub 0 air. It may take up to 30-45 minutes for the defroster to blow hot air. Thermostat, water pump, heater core, all good. Been to Schmelz VW/Saab Dealership in St Paul, MN 3 times for the same problem, but they can't duplicate the problem so I get charged for them to look at it, and they can't fix it without seeing it first hand. ($150 a whack) It has to be an outside vent door, or defrost vent door malfuctioning. The Dash Heater Control Unit seems to be functioning fine. They coundn't get any codes from the dash unit. I'll try to get a code when it happens again, if we get some REALLY cold weather here in WI soon, by hitting the Off and Auto Buttons at the same time. I've lost all faith in Dealership Mechanics! Not the first time they've missed something that was obvious or couldn't fix on my car! Any help would be greatly appreciated.
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