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Hello, I got a Nissan B14 (1998 Super saloon - 1.6 Cc) recently and found that the radiator fan is directly wired so its running all the time when the key is ON. I want to fix it & my technician asked me to put a new coolant temperature sensor plug. I put it but now the fan is turning on when the engine is HOT, but it's not stopping when the engine is completely cooled down. also the fan does not turning on when i switched on the AC. I'm not an expert so can you guys please advice me what i need to check & how to fix this issue ??

Thanks very much in advance.
 

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09 Altima 3.5SE 6MT Sedan
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6,365 Posts
Probably a fan relay is sticking (relay controlled by temp sensor-which probably wasn't defective) and the reason it was jury rigged in the first place. Check your wiring diagram in your FSM for location of relay. You could also install an aftermarket relay and custom wire it to your new sensor.
 
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