Hi,
Last night I drove my rx330 at highway speeds for the first time in a long while. Good news -- it was a pleasure to drive under highway conditions, and my mpg went up to 21.5 mpg. Bad news -- the climate control (on auto) seemed to behave strangely. It was 40 F outside and I set temp to 71F. At first the climate control seemed OK on auto. Then I noticed it was getting cold in the cabin, and the vents were blowing cold air. I turned off the climate system and then on again, but it didn't seem to get better until I was able to turn the engine off completely. Even now it seems fickle, seems to blow either hot air or cold air. Am I missing something? Thanks for reading this.

 

I had the same issue so I just turned the auto off and increased the temps to around 82 degrees and finally hot air was blowing...

 

There may be nothing wrong with your system. Your AUTO setting was 71 F., which is quite cool, esp on a day when no radiant heating is involved. On a summer day, you'd have had a gale of cold air from the vents as the system worked to keep the cabin cool, but on a cool day such as you describe, you'd still end up with a pretty cold mix for vehicle temp of 71....................