fan giving problem - Alfa Romeo Forum
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fan giving problem


having this problem yesterday. as per normal, after the drive and parked my car, switch off the engine. but something is not right. both of my radiator fans is still running. i thought perhaps the engine is hot hence i decided leave it for a while. after 15mins, returned to check, the fan was still running. eek! eek! eek! eek! tks god i quickly grab my key and start the engine or else my batt sure gone flat.

now i've pull out a fuse from the fuse box under the driver comparment and founf out that is only for one of the small fan, the bigger fan is still running. trace the fuse link, it's located at engine bay but i can't open the cover to remove the fuse coz it was blocked by my Novitec strurt bar. so what i do is to disconnect the connector of the fan.

what is the problem? some wiring problem or what?
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It's probably the water temperature switch/sensor in the radiator, sticking in the "on" position and completing the circuit.

The only way to test it is to connect one lead from a bulb to the switch. Connect the other lead from the bulb to the battery (+) and connect the other prong on the switch to the battery (-).

If the switch is okay (cold engine) the circuit should be open/bulb off. If the switch is sticking on, the circuit will be closed and the bulb will come on.

Change the radiator switch if it's sticking on. They're small so only going to be a few quids.

Until you solve it, you can run some wires from the temp sensor switch to a manual switch inside the car and back to the live feed. Then you have to switch the fan on and off manually until you sort it.

Ralf S.

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tks for the info. for your info, even with 1 small fan running, i notice my engine temp hardly to reach 80'c eek! eek!

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