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 , 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 , January 22, 2011
Where is the blend door motor located
COMMENT by , January 22, 2011
Behind the dash, on the heater plenum assembly itself. The dash must be removed to have access to it.