coolant fan not running automatically

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  #1  
Old 08-31-08, 03:12 PM
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coolant fan not running automatically

I have a 96 Ford Escort...the coolant fan won't start up automatically. I have tested the fan itself directly to the battery, and the motor works. I have replaced upper relay under hood, inspected the fuse, and checked the lower relay hidden under the air filter(both looked ok). This isn't a problem when car is moving, because airflow keeps temp down, but when idling, it tends to warm up over half way(but not overheat.....yet.) My repair manual mentions the coolant temp switch and coolant temp sensor, but fails to mention the locations of the 2 parts. Any help and wisdom would be great!
 
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Old 08-31-08, 04:13 PM
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checked the lower relay hidden under the air filter(both looked ok).
Just for an argument....what does a Relay that doesnt look OK look like?????

Which engine is in the vehicle....???

Look at the thermostat housing....There will be a sensor in close proximity.....Is the Check engine light on????...I dont think a fan "Switch" is used on a care that late, Which likely means the PCM commands the fan on at a predetermined temperature....
 
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Old 08-31-08, 05:15 PM
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1.9 engine.....relay did not look burnt or blown. Check engine light bulb burned out some time ago, car has 312,000 miles on it. It is used as a courier vehicle. Other than the fan problem, it still runs great and gets about 34 mpg avg. Haynes manual said if fan motor still working, problem probably coolant temp switch, but neglects to give location or any other mention of it.
 
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