Question about 1998 Chevrolet Blazer

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When the heater is shut off heat still blows out

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Some manufactures do not shut off fans there are on ata very low speed i do not know the reasoning behind this..

Posted on Apr 09, 2011

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Make sure the heater core is in the open position by using the shut off valve and turning it to open. next, you may have a malfunction in the direction door the directs the air flow in the dash. a lever may have become lose or separated. may be a bad servo motor not directing the door to move to the heater position. i would start by checking that shut off valve first on the heater core.

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