2002 Chevy Trailblazer No Floor Vent Heat

The air won t blow out the dash vents.

2002 chevy trailblazer no floor vent heat. The mode doors which direct air flow in the heat ac system of your 2002 chevrolet blazer are controlled by engine vacuum. It started a year ago by first steaming up my front window thru the defrost vent. Also it only works on 5 it sounds like you have two problems. When the mode is selected to floor or bi level the air comes out the defrost vents.

I have no floor heat on my 2002 chevy s 10. Since then i cannot get any heat to floor vent. No work done on car recently. I move the selector to floor and it comes out the defrost vents.

The blower on my a c on 2002 chevy trailblazer only blows from the floor vents and the defroster vents but not the dashboard vents how can this be fixed. I have a chevy 2002 s10 blazer with heater problems. A forum for all things trailblazer ss including mileage horsepower transmissions interior mods tires and more. 2002 chevrolet trailblazer air will not blow out of the floor vents for heat author sparky posted on november 22 2016 november 22 2016 categories sparky s questions answers rodney.

The first step would be to check the vacuum supply hoses under the hood make sure they are properly connected with no leaks and vacuum is being supplied to the vacuum line heading to the interior. 99 chevy s 10 blazer heat will not come out of the floor vents. I had the coolant read more. I have a 2002 chevy blazer.

Vent and defrost work fine but when you switch it to floor it hesitates a few seconds and then the hot air comes out the defrost near the windshield. It blows out the floor vent and the defroster vent but it won t change and blow out the dash vent. The heat ac system does not blow air out of the floor vents.