Question about 1998 Ford Windstar

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Coolant temp is normal while idling, cools off when fans cut in

When vehicle is idling the temp reaches normal, but when vehicle is moving and the fans cut in, the engine temp drops out of normal range, and when this happens, the heater is hardly blowing hot air. This is on a 1995 Ford Windstar, with a 3.8litre engine. the coolant level is right up. Could this be the sensor that regulates the two electric fans?

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I would check to see if the stat is working right, do you have rear heat on this vech? . if you do you may have a air pocket, the windstars have a metal tube coning from the water pump that gose to the heater core lines for the rear heat and they like to fail. they get a pin hole leak that hard to find, the water pump also likes to fail also, not moving a enough fluid under load the ends of the inmpler wear down

Posted on Dec 23, 2008

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Cooling fan is acting strange car is heating some when idling how can I trouble shoot or fix


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Try this for a diagnostic:
Check coolant level. Fill if necessary. Check for leaks.
Start vehicle. Allow to run.
Observe coolant temp gauge. It should slowly climb to center.
Once coolant temp gauge reaches the middle, the coolant fan is triggered to activate by the vehicle's computer (ecm). Fan should come on until temp drops slightly then cycle off.
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