What's wrong with my heater?

Possibilities: Low engine coolant level .. Engine thermostat partially stuck open .. Restricted coolant flow through heater core .. Temperature mode baffle/door in heater case inop .. In dash heater control panel malfunction .... DIY = Check antifreeze/coolant level while engine is cold, fill as needed .. For further diagnosis, suggest visit repair facility... Repairpal certified & other repair shops in your zip code listed in link below : http://repairpal.com/repair-shops

Can you post how you fixed it ?

Broken heater control valve?