I have only owned the vehicle for 4 days now, I usually only drive back and forth from work only . Yesterday I had errands to run so drove it a bit more. It stays at or around 210 (halfway on the guage) . Yesterday it got a bit above that so I became concerned and turned on the heat. I have never had the air conditioner on so I do not know if that will or will not affect it. I can only guess that it would become hotter if it were just sitting. I can check it this evening.