Why does the Magotan's heater blow half hot and half cold air?

[StephenMarie]

There are several reasons why the Magotan's heater blows half hot and half cold air: Incorrect temperature settings: If the temperature is set higher on one side and lower on the other, the dual-zone climate control requires adjusting the temperature for both the driver and passenger sides. If one side is set too low, it may result in one side blowing hot air and the other cold. Incorrect adjustment of the hot/cold knob: If the hot/cold knob is not set correctly, such as not turning it to the red side when hot air is desired or not turning it to the blue side when cold air is desired. Blocked heater valve: A blocked heater valve can cause uneven temperatures. The automatic dual-zone climate control system uses two water pipes to the heater core. If one pipe is blocked and the other is not, the temperature on each side will differ, resulting in uneven air temperature output.