My 98 Lexus gs 300 is blowing cold air out driver side but hot air out passenger side when heats on

SOURCE: lexus is350 heating system malfunction

each dual heating control controls an actuator for a door to open and close may havea bad actuator motor for the passenger door should take to a shop where they can get body codes out of the system after market parts places like autozone cannot pull these codes most repair places can

SOURCE: 2001 lexus gs300 ,heat comes out drivers side

your blend door on your passenger side is most likely stuck in the cold position. Chances are you cable is broken. Good luck.

Testimonial: "thanks,"

SOURCE: Heating and AC problem.

I had the same thing on the same model car. Sounded like I had a gerbil living (running around in a little wheel) in my dashboard. I think the replacement part is called an accuator (it is relatively inexpensive) but the whole dashboard has to be removed to put it in. It controls the opening and closing of the vents. Apparently even taking the dashboard off is not as difficult as dealers often indicate - but they bill for a lot of time - so the job is an expensive one unless you do it yourself. I ended up having a friend do it for me.

SOURCE: I have a 98 lexus gs 300. The heat was working

fuse or relay has blown

SOURCE: Lexus GS 300 AC on Drivers side, Heat on Passenger side

You will more than likely need to replace the whole heater control unit in the dash. Thier like mini computers now and usually if one side goes down it means the whole unit is shot.