2002 Chevy Trailblazer No Floor Vent Heat

When the mode is selected to floor or bi level the air comes out the defrost vents.

2002 chevy trailblazer no floor vent heat. 99 chevy s 10 blazer heat will not come out of the floor vents. It blows out the floor vent and the defroster vent but it won t change and blow out the dash vent. The mode doors which direct air flow in the heat ac system of your 2002 chevrolet blazer are controlled by engine vacuum. The heat ac system does not blow air out of the floor vents.

Also it only works on 5 it sounds like you have two problems. No work done on car recently. Since then i cannot get any heat to floor vent. Chevy trailblazer ss forum.

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. I have a chevy 2002 s10 blazer with heater problems. The air won t blow out the dash vents. I move the selector to floor and it comes out the defrost vents.

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. I had the coolant read more. All other settings work normally and all temp and fan speeds setting work normally. A forum for all things trailblazer ss including mileage horsepower transmissions interior mods tires and more.

It started a year ago by first steaming up my front window thru the defrost vent. I have a 2002 chevy blazer. 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.