Why is forced cold air coming through my vents when the heater is on?

BabyGurl1

New member
Jun 1, 2008
23
0
1
I have a 1977 cutlass. Today I realized that somehow cold air started to come out my vents on the dash. This is forced cold air from outside the car. It's like there is an open vent somewhere but my car is equipped with floor vents not the ones in the dash for having forced air blown into the car. My heat works great on the floor and defrost but the forced cold air needs to stop.
I am unsure what the blend door is? There is no option for me to open or close the vents on the dashboard to the outside air, that i know of. Unless it is able to be done manually. If you could give me a little more detail that would be great. THanks
 
Back
Top