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Why does heat blow hot when moving and cold when stopped

(1999 Ford Windstar)
in Providence, RI on January 15, 2011
when vehicle is moving heater blows hot ,when vehicle stops blows cold. fluid levels are good
Displaying 2 answers & 1 comment
Popular Answer
on January 15, 2011
What does the temp gauge read? If the t-stat is stuck open, it could potentially cause this concern. Also, there could be a lack of coolant flow. Run the engine to operating temperature and feel the heater hoses in the engine area going into the passenger compartment- both should feel about the same temperature. A possible restriction in the heater core may also be a problem.
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on January 17, 2011
temp gauge reads normal about half way and steady
on March 18, 2011
low coolant leval
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