So I've noticed this issue three times already so I'm here to get some advice. Lexus dealership didnt know what it was either, they checked the coolant and it was fine. I've noticed that if the car stops moving for an extended period of time but the car is still on, the auto climate control turns off thr heat and starts blasting cold air. Once the car starts moving, the warm air starts again.

It doesn't matter if the car is in gear or not. Turning off and back on the climate control doesn't fix it. Raising the temp doesn't fix it. The issue seems to be tied to if thr car is moving. This issue doesn't always seem to happen but I've noticed it three times now within the llast few weeks.

Ideas?

 

Bad water pump

 

Agreed. Or thermostat. Any recent work done? If so, there may be air in the cooling system and it needs to be purged via the bleed screw on the upper rad hose.