I think unplugging the sensor would probably do the job, but that's a bonnet-up job.

So no, I don't believe there's any way without wiring in your own timer and relay.

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On A/C models the fans sometimes stay on for a short time if the gas pressure is high, but if you're seeing the fans stay on when the A/C has not been in use then it's because the fan controller is broken or because temperatures have got far too high. The fan run-on is a last ditch attempt to bring the temperature down and actually has very little impact beyond the water currently in the radiator as the water pump is not running.

Either the fan controller is faulty, or you have big problems somewhere else in the cooling system. Start by confirming correct operation of the fans. Pull brown coolant sensor plug off while the ignition is on. If all is well both fans will run for a few seconds at low speed and then switch to high speed.

If this checks out then ensure the system is correctly bled and run the car up to temperature and check the fans come on correctly, at 97 degrees. If this doesn't bring the temperature down and the fans have to kick up to high speed then you probably have a clogged up radiator. Under normal running you shouldn't see high speed fans, except when the A/C gas pressure gets very high.

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Rich

^^ on this one rare working model

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clio r27
ps3 id:cooperkloe