Suspect water pump

Originally Posted by fryzia23

I started turning wrenches 5 years ago at one manufacturer(lexus) so I can only base my experience from that. I came from oil changes, diagnosis to engine overhauls. Generic diagnosis might be similar but part design, type of noises, common issues, procedures, etc could be way different so sometimes trying to fix one car based on another doesn't always work. Fortunately switched to Porsche two months ago so no longer with boring lexus

Anyhow lets try to help OP to fix his car. Since the car is only overheating on idle with ac on I cant really think of anything except insufficient air flow through the radiator. If there was an air pocket it would still overheat with AC off, the heat in the cabin would fall off from hot to warm during idle. Strange..