[Jackpine]

I've never heard of this, Rich. My truck has the "climate control" feature too and it works as it should regardless of what tune I'm using.

Mine is electronically controlled and can be adjusted with buttons on the steering wheel as well as "up/down" controls on the dash. Sounds like your controls are a bit different and I don't have a wiring diagram for your truck.

I cannot understand why a "tune" would have this effect in your vehicle.

Possibly, Bill might be able to figure it out if you were able to get hold of him.

- Jack