Have you tried alternating (on/off) the "auto" feature? Does it affect the heat? When was the last time your heating system coil was flushed? There is a temperature control valve also. If you don't want to go to a Lexus dealer, find a good local independent mechanic.
RX400h heating issues
in 04 - 09 Lexus RX330 / RX350 / RX400h
Posted
Have you tried alternating (on/off) the "auto" feature? Does it affect the heat? When was the last time your heating system coil was flushed? There is a temperature control valve also. If you don't want to go to a Lexus dealer, find a good local independent mechanic.