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Radiator fan won't kick into high speed !

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Hi all,

My radiator fan won't kick into high speed mode when engine is hot even if I turn the A/C on... I checked fan relay and it's fine. All fuses are not blown. With engine running I can see the fan is spinning (low speed is working) but will no switch to high speed like it always use to.

Anyone know what coolant temperature it's meant to switch to high speed mode at?? I was starting to think it might be the fan control module but could also be the coolant temperature sensor I guess.

Can see in photos at the end of summer is when I noticed it not coming on, a few times on a hot day it reached as high as 101 degrees Celsius... Is that too hot?? I had only ever seen it get to as high as 97.... I can't afford to cook the head gasket....

Any help would be much appreciated!


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