The heater core is a small radiator that warms the car’s cabin using hot coolant from the engine. The cooling system’s hoses circulate liquid coolant through the heater core as they do through ...

As winter sets in and temperatures drop, a functioning heater becomes a necessity. But what if, instead of warm comfort, your heater blows icy air through the vents, or fails to work altogether?

Cold coolant flowing through the heater core can’t produce heat and won’t warm up your car’s interior. A stuck-open thermostat also causes poor gas economy, elevated tailpipe emissions and ...

Find out if there are any recalls on your car. Heater hoses are rubber hoses that circulate engine coolant to and from the heater core, which is the small radiator that provides heat for the cabin.