heater blowing cold air. on 2000 Ford E-150

I have changed the thermostat,heater hoses are hot and in good condition. I have a blend door switch and and a selector switch coming in the mail and the door actuators seem to be working fine. No codes on my scanner. Any suggestions on what I'm missing?

Thank you
Barry Brown

Asked by for the 2000 Ford E-150
What engine? Water pump pumping enough volume through heater core? Both hoses burn your hands?
2000 e150
4.6 engine
Both hoses are really hot.
Can you tell me how to check if the blend door is broken?

Thank you
1 more answer
Door actuators work fine? so why buy a blend door switch and selector switch?...