climate control problem. Outside air keeps coming in

[fernandito7]

I am having a problem with the climate control from my 07 tahoe. Whenever the climate control is off i keep gettting air coming from the outside. I push the button that recirculates air and for the outside air not to come in but it still does. When i push the button all it does it blink. I was able to get it to stay lit once but once i turned off the tahoe and turned it back on i couldnt get it to stop blinking. This is annoying cause outside air keeps going inside through the vents when i dont want it too. How do i stop this?????????????/

 

[metal rail]

You can't stop it. The only time you can use the recirculate function is with the AC on and I believe also with the air coming out of the dash vents only.

 

[Rollin Thunder]

when you push recirc did you make sure to move the air direction to head, it will not work if it is on feet, which i think it defalts to when it is turned off.

 

[wedtwuk]

Metal Rail is correct. The recirculate feature only works with the A/C. It does not work in heat mode.

 

[Rollin Thunder]

mine works in heat mode, must be a gmt 900 thing

 

[EROC]

I found this out the other day! If you have Dual Zone Climate control and it is running then your vents never shut off...
Try that.