Thank you for that.
This problem is likley the main control board or the thermistor. More than likely this is going to need a a new start relay on the compressor as well as the main control board on the back of your fridge.
Both parts are super easy to replace and I will help you once you have them. The board is a little pricey though so you may choose not to replace that but to replace the fridge?
Please let me know on that?
The best place to get these two parts is: http://www.espares.co.uk/browse/ma2322/rangemaster
Its best to call to order these parts to get up to date pricing and availability. Also if you call to order he parts they usually ship them to you the same day or next day;-)
Please call espares: 0844 9777 888 .
In any case, I will stick with you until this is complete.
Please rate my service kindly.
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Thank you and have a great day!