My Lexus heating system.

Asked by Oct 13, 2016 at 03:12 PM about the 2004 Lexus RX 330 AWD

Question type: Maintenance & Repair

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?
Thank you.

1 Answer


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.

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