My Lexus heating system.
I have a 2004 Lexus RX 330. It has a dual Heat/Ac system. Suddenly, the
heat only works on the passenger side. Just cold air on the drivers side. The
A/C works fine on both sides. The coolant level is fine. The temperature
needle is right in the middle. Any thoughts?
One of your blend doors has failed. It's not opening up to let the heat into the drivers side. Never torn one apart for a Lexus, but I'm betting it's an electronic gear driven door. You can search Youtube for some DIY videos. Or if you're not handy with cars, bring it to your local mechanic.
when it isx cold when I start my car it have a ringin sound once it get warm it stop