2002 ford escape, heater works fine until the temperature goes below freezing, then it's just cold air. coolant level and protection are good. upper and lower rad hose temp are hot. hoses to and from heater core are hot.
most probable cause?
Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.