I have noticed with my 2011 F-150 that the vents blow out cold air even when the AC is not activated. I think we all know that with a manual HVAC system turning the temperature control dial to blue does not cool the air, it simply doesn't heat the air and brings outside air into the vehicle at whatever the ambient air temperature is. So on a 90 degree day if you turn the temp **** to blue it will blow 90 degree air. Well my F-150 almost always blows very cold air. Cold to the point that if I turn on the AC the temperature doesn't drop. Now after a few attempts at turning on an off the AC button, it will eventually stay off.

Has anyone else noticed this problem?

NC

 

Yes I have noticed it in my 11', especially in the morning...Maybe a freon leak?

 

Here is my new theory . . . .

The system detects moisture and activates the AC to remove condensation and prevent mold/mildew. I have noticed this happens most of the time early in the morning after a warm day when there is very likely condensation in the system.

Thanks.

NC