Heat coming from vents when only vent is on

[roveer]

My 2006 Eddie Bauer recently had a radiator failure and an overheating event. I had the dealer put in an aftermarket radiator and that problem is solved.

Now I seem to have a problem when I turn on the vent I get full heat. If i turn on the AC full blast I sometimes get cold out of the left console vent and hot air out of the right console vent. This is with Dual mode turned OFF. It seems after a period of time I get cold air out of both vents. I believe if I just turn on the vent I get heat from both vents.

Is it possible this was due to the overheating event? I had turned on the heat full blast to try and keep the radiator temp down.

Ideas? A bad thermostat? Dreaded blend door?

Thanks,

Roveer

 

[mackenziet]

Bump to this, experiencing the same issue

 

[asull85]

It sounds like it could be a blend door issue to me.

 

[dantheman68]

Do you have the EATC or the manual controls?

If EATC, get the truck up to operating temperature, and go into the diagnostic mode of the EATC by pressing Defrost 7 off simultaneously (press, not hold) and then within 2 seconds of releasing, press the auto button.

The display will do some crazy stuff then display a numeric code if an error is present, if not, it will turn on all the icons in the display for a few seconds if an "all clear" is given... press the main "colder" button to cancel the test

If defrost & off doesn't get the self test, try the same thing floor and off. I've seen both trigger the test.


passenger blend door - 2267
drivers side blend door - 2266