Nope, it never overheats during summer but been cold for the last 2.5 years. It's not that the heater blows cold air, it's just significantly colder than "normal" cars, so whenever the car is iced/frozen and I remotely start it with the heater set on max defrostm all the way in the red zone - after 20 minutes of idling - the car is still kinda "cool" - whereas the Duratec will be hellish hot after 5 minutes.