Technical 1.6 overheating fan radiator not working

[stmterrace]

Yet more trouble with the multi.
Recently had the rear sub frame replaced with extras and was informed that the sump was leaking so i thought I would do that myself, anyway couldnt get to one of the sump bolts due to another bolt obstructing holding a bracet it and as working on axle stands couldnt get enough purchase to lossen that and so the last sump bolt was impossible to remove so gave up.
After restarting i noticed that the radiator fan was not cutting in and that steam was starting to come from the radiator so i switched off.
Now it might just be one of those things but i dont think that there was anything I might have knocked underneath the car that could of caused the problem.
I have changed the large 40amp maxi fuse near the front right suspension unit (when looing at the car) and have tested the fan direcly by wiring up to a battery and that turns over without any problem.
Are there any other fuses relating to the fan system.
There seems to be a few very small bubbles rising when first turning the engine on in the expansion tank and all pipes within the cooling system seem to get hot and off course the coolant rises.
Heater blows hot as normal.
Any ideas??

 

[pete123]

Have seen this problem before have a look a thurmastate I can't spell lol

 

[stmterrace]

Thanks there appears to be another heat/temp sensor on the radiator fan, has a blue and a white wire coming from it which then pass on to the connector just above the fan. Thought I might check this first.