2010 RX350 and have problems with the A/C system. It blows cool air on the driver side but only very hot air on the passenger side. This happens all the time. The left side will blow cool air but it doesn’t matter what temp I set on the passenger side it only blows very hot air. I know about that "DUAL" button, I just have set the same temperature on the both sides. The actuators were checked and work okay. Thank you for your time!

 

There are servos that control the air flow between hot/cold [and other settings like direction of conditioned air]. Is that what you meant by actuators? If yes then there is a contradiction and that needs to be re-examined/tested. Scope of the work is already narrowed to passenger side. it can be that the triggering electronics is bad or ducting is bad. Problem with ducting is pretty remote.

Salim

 

^^ Agreed. A/C issues like this typically are caused by servo motors that have failed or blend doors that have become stuck.