Heat will not stop coming through the vents of my 99 Chevy Blazer

Asked by Oren Mar 10, 2016 at 11:30 AM about the 1999 Chevrolet Blazer LT 4-Door 4WD

Question type: Maintenance & Repair

When I turn my heater off hot air still seeps out of the vents
even when I turn the thermostat switch all the way down to
66 degrees. Could it be the blend door actuator
malfunctioning? It's getting really hot so I need to address
this situation as quick as possible any advice would be
greatly appreciated.

2 Answers
30

Myoungblood answered 8 years ago

Yes it sounds like your actuator is stuck open allowing the engine heat in.

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10

Sue answered 6 years ago

Vacuum line from outside to inside

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