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Old 18 Dec 2012, 03:16 pm
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Default Why does my 94 Honda Accord cooling fan only operate when the car is turned off?

The temperature gauge is fluctuating into the high temp area when the car is idling or in stop/go traffic. When I drive, the temp cools down. I've installed a new thermostat and performed a radiator flush and refill. Looking under the hood at idle, the radiator cooling fan does NOT come on as the engine temp increases, but DOES come on after I turn the ignition off. Are we talking a faulty temperature coolant sensor here? Why does the fan come on only after the engine is off?































IMPORTANT: The fan DOES operate (along with the compressor fan) when the A/C is turned on, and that seem to cool the engine down.
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Old 18 Dec 2012, 03:31 pm
R K R K is offline
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the engine is always going to run hotter in stop and go traffic.it's normal for the fan to run a little when you turn the engine off.if the fan wasn't going on while you drive, the engine would burn up. naturally,















the engine is going to cool down when you go faster,there's more air going through the radiator,















the faster you go.
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Old 18 Dec 2012, 03:50 pm
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my fan which i thought was the radiator fan stayed on after i shut the car off and it ran my battery down, then i noticed my exhaust button was on, shut that off and the fan stopped. i took the car 2 auto zone an it was a sensor.. by then the radiator fan motor was shot.. had 2 leave the heat an heat fan on 2 stop it from burning my engine up.. while driving
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Old 18 Dec 2012, 04:02 pm
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Did u put the correct thermostat for your car becuase diffrent thermostat open at a diffrent temperature also ur cooling fan comes on when the car off becuase the engine is off and thier no water going thru it or oil splashing around to decipate the heat so ur engine gets about 5 to 10 degrees hoter with engine off and your cooling fan is suppose to come on with engine off
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Old 18 Dec 2012, 04:16 pm
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It runs when you have the engine on, trust me. It isn't always on though. The fan comes on after you shut the car off because the oil pump is no longer functional, so the engine has to rely on air cooling to cool down. My friend's 88 Escort does the same thing.































The reason why it seems that the fan doesn't run when the engine is on is because the engine is much louder than the fan.































Everything's gonna be alright.
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