Hi everybody,
i have a lexus gs350 fsport 2015, yesterday all of a sudden the ac on passenger side is blowing hot air even though i put it to low, its still blowing hot air, while on the driver side its blowing air depending on the temperature i set !!
so weired i tried to look in the forum for any one who had same issue but it seems not.
please if anyone have an idea on how to reset it or anything to help solve the issue.

Is it out of warranty, I imagine?

You can try disconnecting the negative terminal and letting it sit for an hour, then reconnecting. This should reset everything.

I used to to do this often on my BMWs when the electrical was giving me problems. Usually once or twice a year. Worked like a charm.

yeah unfortunately it is out of warranty, i will try to do what u said and get back to u with any updates, hopefully it works.
thanks alot friend for the idea.

yeah i tried it, sorry but it didnt work.

now i called my friend he is saying that he needs to reset something in the car and to take it to him after the holiday.
i reply you with what happend then

100% sure,
i tried to put the dual on and then off, move the climates up and down but still, passenger side is heater no matter what i do.

Sir,

Obviously you need to have the dealer or an independent shop take a look.

My broad guess is that the system either has a solenoid failure that controls the maintenance of different temps in dual systems, or has a leak in the system which creates that situation.

Dual systems can be sensitive especially if one person is running 68 and the other 78.

took the car to my friend shop, he reseted the servometer 3 times, and it was solved.
thankfully i didnt have to take for agency as they charge around 50 dollars just to take a look.