Dometic fridge

[Margan]

Hi guys
I have a 240v, gas &12v fridge in the MH, last Feb the fridge stopped working on electricity, I found out the heat element had gone and replaced. I was working better that ever until last month when it stopped cooling and the green led to indicate it was on electric was very faint, I was advised by dometic that it was the circuit board (where the selection switch’s and thermostat is) this was replaced!! But still the problem is there??
Please help

 

[autorouter]

Is the fridge level? These 3-way fridges don't work well if the left/right tilt is more than about 5 degrees.

Does the cooling work when it's on gas or 12V power? If it does, then the problem is with the 240V circuit, not the liquid/gas circulation that produces the cooling.