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2001 Expedition heater not heating

Tiny
LHP31206
  • MEMBER
  • 2001 FORD EXPEDITION
I have a 2001 Ford Expedition heater that is not working I have changed the thermostat twice, the first one would try to heat just a bit, and the second one would work sometimes if you kept moving the temperature controls. The a/c works perfectly. But the heater just blows cold air. Can you tell me what may be the problem?
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Saturday, January 1st, 2011 AT 11:59 PM

1 Reply

Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
If both heater hoses comming from the heater core are hot, the blend door is NOT moving, if the inlet hose is hot but outlet is cold, the heater core needs flushing, or replacement. If both hoses are cold, check antifreeze level and thermostat, also rarley but known to happen is the impeller blades on the water pump disolve over time and may not be pumping enough.
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Sunday, January 2nd, 2011 AT 12:04 AM

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