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

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1 answer
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