The fridge light came on, but the cooling mechanism didn't come on (didn't cool or make any noise)
Step 1: Examining the Thermostat
The Thermostat contains an expanding copper pipe contraption, this pushed against a spring loaded metal plate.
As the pipe contraption warms, it expands against the metal plate and turns the fride on, as it cools the springs push the plate and the fride turns off.
There are a couple of screws that adjust the springs tensions, thus adjusting the temperature that that fridge starts up and turns off.
Step 2: Adjusting the Bite Point
This suggested a sticky switch, or that something had worn away on the plate not allowing the plate to quite turn the fridge on.
It turns out that a tiny set screw on the side adjusts the bite point of the plate operated switch, adjusting this resulted in the fridge working 100%