electrolux rm2310 3way fridge

I have a thermostat problem with my fridge. It's not working. Fridge acts like freezer, freezer acts like super deep freeze. Control knob just turns. No effect. Suspect fridge running continually
Problem is have to remove fridge to get to thermostat which is underneath. Cannot undo gas connection. Gas pipe turns with locknut. (Is it clockwise or anticlockwise?) Do not wish to twist or break pipe. Any info would be appreciated. (realise taking to fridge mechanic obvious solution - however feel that it might be something simple)
p.s. van must have been built around fridge as it is bigger than doorway and windows so might have to work on it in van.
Thanks Jayeff