Why does my Radiator fan turn on when cold/hot?
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Joined: Aug 2012
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From: Georgia
Why does my Radiator fan turn on when cold/hot?
So lately one of my radiator fans turns on as soon as the ignition is switched on. The engine could be cold or hot. Has never done this before just recently last week it started doing it. Any help as to why?
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Joined: Jun 2006
Posts: 6,902
Likes: 151
From: Grand Island, NE
The ECM tells the fan when and how fast to run so it could be that.
The engine temperature sensor tells the ECM when the engine is hot so it could be that.
And, there is the controller on the fan.
The engine temperature sensor tells the ECM when the engine is hot so it could be that.
And, there is the controller on the fan.
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