my car just stopped producing heat? on 2007 Chevrolet Equinox

the blower is working and there are no leaks or smells..what can i check? I also get regular oil changes and they check fluid levels

Asked by for the 2007 Chevrolet Equinox
1st ck your coolant level in the radiator. then ck to see if you have all a/c heat related functions. like defrost, air though a/c vent, air thru heater vents below. if you do you may have a blend door problem