Bad dual heater climate control valve

AC blows hot air on passenger side and cold air on driver side. I am hoping by changing the dhccv the a/c goes back to blowing cold air. I want to know if this valve being bad also causes the passenger rear door ajar and service park brake light to come on? The door is not ajar and nothing wrong with brakes. If I push the window switch for the rt rear window (this is the passenger door ajar issue not the door) the warning light and inside lights and light under side mirrors goes out. If I stop the car and turn it off and turn it back on the service park light goes off. I was told the heater control valve will cause these warnings to come on? How is this possible?