Problem: Rear of interior does not have good air flow. On the passenger side, no heat/ac distribution for the back seat. Cold air flows along the right end of the seat, but no heat. The driver's side gets a good flow of heat from under the driver's side. Same problem in the summer only worse, the only way to provide cold air to the rear passengers is to turn up the fan full blast and point the front air ducts to the back. A compression test was done and no leaks were found through the doors. We do enable the interior air flow button, which has to be done manually.