I have a 98 blazer 2door s10 style. My heater blows to all the vents except the floor vents when u turn the **** for the floor it blows thru the windshield defrose vents instead of the floor. Iam thinking a blen door is stuck closed but i want to hear some other people's answers Thanks

 

yep, somethings stuck, or not working with the blend doors or actuators. very very common problem and i believe there are lots of threads and diy for this fix.

i just shoved a coat hanger up the floor vent untill i got heat through my defrost.