2000 Ford Expedition Heater Blows Cold Air?

Replaced Heater Core, Both heater core hoses are cold to touch, has plenty of anti-freezr, replaced thermostat, blend door works, blows very hard just blows cold. How do I fix?

Replace the heater core, it's plugged. If you're adept at dealing with the heater hoses you could try disconnecting both hoses, blowing it out and filling it with CLR for an hour and the flushing with water, then reconnect, it might work.

Replace water pump

Head gasket or bad water pump

Hi so has the car reached a working temperature i ask this because having seen some rather odd questions here today.