Why does my car heater keep overheating?
Why does my car heater keep overheating? Other times the heat works fine for a while and then starts blowing cold air. Usually when it starts blowing cold air I begin to smell a sweet odor, possibly coolant. It hasn’t overheated again, but I have stayed off the highway. I just had the thermostat changed, and the upper radiator hose warms up quickly. How does intermittent heat work in a car? Now I have intermittent heat. Sometimes I will start the car and it will take 20+ minutes for the heat to blow warm air. Other times the heat works...