I'm puzzled with why this car doesn't hear properly. The car gets to normal operating temperature quickly, doesn't over heat or run cool. Takes a while to blow warm air once getting to normal operating temperature, once it does start blowing warm air, as soon as the car stops and return to an idle you loose your heat.. but once you rev it up or drive it, it will keep you warm no porblem. First item I checked was coolant level and it's not low. Doesn't seem like a thermostat either... Any thoughts?