Why does my heat get cold when I drive?
Why does my heat get cold when I drive? Hot coolant from the engine passes through a heater core, which looks and functions a lot like a small radiator, and a blower motor forces air through it. It's also the reason that a plugged heater core, stuck thermostat, or air in the cooling system can all cause a car's heater to blow cold. Why does my Dodge Ram have no heat at idle? I have a Dodge Ram 1500, I have changed the heater core, radiator, the water pump, and the thermostat. When I push on the gas it blows...