Defogger problems of the 2008 Ford F-150

Without noticeable prior warning I had a malfunction of 2008 Ford f150 climate control ( blending knob control). The vehicle is blowing hot air only. I can not control the temperature.

The contact owns a 2008 Ford f150. He stated that the auto temperature control unit was defective and would constantly blow hot air or intermittently blow hot and cold air. The failure would cause the windows to fog and make it impossible for the driver to see the roadway in front of him. The dealer advised the failure was normal and the vehicle was not repaired. The failure mileage was 22 and the current mileage was 27,169.

2008 Ford f150 lariat w/auto temp control. Auto temp control does not control temperature as set, blows constant hot air and on occasion blows hot and cold air intermittently. Does not control temperature as set by atc display. Have had the truck to the dealer 3 different times. First two trips the dealer said it was working as intended, mileage was 157 the first time, and 2052 mile the second trip. On my third trip at 5466 miles I was told that there was an oasis bulletin special service message #20422 issued on 09/06/2008 covering my problem. According to the message the cause was the blend door actuator. It also states to not make any repairs at this time as parts are due in mid-October, no parts as of 11/11/08. This defect is supposed to be on 2006 - 2008 f150 Lincoln mark trucks.