I have a problem with Climate control on RX330 2005.
In the summer when AC is on it works perfect on high RPM when I am driving, however on IDLE I am getting warm air instead of the cold. The Speed of the blower stays the same regardless of RPM while air temperature is changing a lot. Now I do see same problem with heat.
When engine is idle I don’t get hot air just slightly warm and as soon as start driving and RPM going around 2k or above I am getting hot air again.
I would appreciate any suggestion.

 

Sounds like your pretty low on engine coolant. Or maybe the water pump is having some sort of a problem.

 

Have you tried running the AC on 'manual' mode? ie just select the fan speed. See if that fixes the problem, then you determine whether it's the AC control/sensor that's playing up, or whether it's something more mechanical like the AC compressor

cheers

S

 

how many miles are on the vehicle? any services done lately?

 

Leop1212- Youhave an issue with your cooling fans that bring air through the condensor which allows the gas to condense. I'd bet good money if you plugged in a fan and directed it to blow through your grill of the vehicle and turned it on, the A/C would blow just fine all day long.

I'd bet you good money that if you idle the vehicle, pop the hood, you will not see the cooling fans turning at idle. When the points go out on those motors, air blowing through the grille while in motion can "trigger the fans to move" thus starting the fan for a while, thus it can be intermitant when at idle after driving as the motors only stop when stuck on a bad point internally.

Check the cooling fan motors. Trust me. It is either the motor itself or the connection from the Fan ECU.

 

Low coolant may explain heating temperature problem while won' make sense for AC

 

110k
have no service done lately

 

Leop1212 - listen to what I wrote earlier if you want to solve the issue.