heater blows cold air on 1997 Ford Explorer

when i turn heat on no heat just cold air

by in Pottstown, PA on December 10, 2010
1 answer 2 comments
ANSWER by on December 10, 2010
There are multiple reasons you could be getting no heat. First, the engine may not be getting warm enough fast enough. This could be from a faulty thermostat - sticking open. Second, the heater core may not have flow. You might have a hot hose going in, but a cold one coming out. This could be from a restriction. Third, you may have a temperature blend door motor in the dash failed. Testing is in order to determine your failure. Good luck!
COMMENT by on January 22, 2011
Where is the blend door motor located
COMMENT by on January 22, 2011
Behind the dash, on the heater plenum assembly itself. The dash must be removed to have access to it.
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