Mechanics

HEATER NOT WORKING PROPERLY

2002 Ford Taurus

Heater problem
2002 Ford Taurus 6 cyl Front Wheel Drive Automatic

THE HEATER IN MY CAR DOES NOT WORK PROPERLY. WHEN THE MOTOR HEATS UP, IT BLOWS OUT WARM AIR AND WHEN YOU TURN THE FAN MOTOR UP THE AIR COOLS DOWN. HOW DO I GO ABOUT FIXING THIS ISSUE WITH THE WINTER SEASON TRYING TO COME ON? I HAVE REPLACE THE COOLANT TEMPERATURE SENSOR BUT THAT DID NOT HELP. ALSO, MY HEATER CORE IS NOT LEAKING.
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RWOODALL
November 18, 2009.



Heater Core — Plugged

WARNING: The heater core inlet hose will become too hot to handle if the system is working correctly.

Check to see that the engine coolant is at the correct level.
Start the engine and turn on the heater.
When the engine coolant reaches operating temperature, feel the heater core inlet and outlet hose to see if they are hot.
If the inlet hose is not hot: the thermostat is not working correctly.
If the outlet hose is not hot: the heater core may have an air pocket.
The heater core may be restricted or plugged.
If both are hot, the temperature blend door in the heater plenum may be broken or stuck.

Merlin2021
Nov 18, 2009.