rx300-driver side air always cold, passenger luke warm

[ed100]

i have a 1999 lexus rx300- only cold air on driver sided, luke worm on passager side.

the heat servo motor is working.

passenger side air seems to be getting a little warmer but driver side is very cold. Fan works great.

 

[Ksjz00]

Did you resolve problem? Got the same :/

[MX-Dad]

Me too.  Would love to determine the fix.  I flushed the heater core, but no difference.
Any help would be welcomed!!!

🙂