Heater not blowing hot air

2000 FORD EXPEDITION
200,325 MILES • 5.4L • V8 • 4WD • AUTOMATIC
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JEFFCOSTA2010
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I have the SUV listed above Eddie Baur Edition. I have replaced both front and back heater cores, i replaced the upper and lower intake manifold gaskets, all blend doors, the blend door actuators, the thermostat, water pump, flushed the whole engine coolant system and replaced with all new fresh coolant and i still am not getting any heat it only blows warm at room temperature and that's all. both inlet and outlet lines on both heater cores are really hot. The coolant temperature is at 210 degrees. I am at a loss and not sure what else there is that could be the issue. All the parts i replaced i was told by the Ford shop where i live to check and replace. where should i go from here? any ideas?
Oct 6, 2019 at 2:36 PM
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ASEMASTER6371
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Good evening,

Is both the front and rear not blowing hot?

Do you hear the actuators moving when commanding heat and cold?

Roy
Oct 6, 2019 at 3:26 PM
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JEFFCOSTA2010
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Correct neither one is. they get a little warm but no where near what it should be when it is on high. And yes the actuators are working correctly.
Oct 6, 2019 at 6:54 PM
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ASEMASTER6371
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How did you bleed the system of air? It sounds like you may have air in the system as the heater cores are the highest point of both systems.

Roy
Oct 7, 2019 at 4:03 AM