Heater blows only cool air even after water temp is up on 2001 Ford Expedition

had stat and core replaced, inside controls work. only one hose under hood is warm

Asked by for the 2001 Ford Expedition
1 answer
If you don't have a water shut off valve, then you need to blow heater core out. Did you drain the heater hoses of debris before hooking to the new heater core.