hey darren,

the fan blocking the radiator cant be it as mine is in similar position.
Below is a pic of the switch im using.

According to the pic of ur switch i wonder if the switch is "in" enough.have a look where mine sits flush when tightened.in ur pic, there is an added black piece between switch and radiator hence question how long the threaded part in ur switch is.
Just a thought

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  20130617_175756.jpg (61.30 KB)


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