-Check ventilation around the fridge. You need 20 - 30mm at sides, 10mm on the top with 100mm at the rear. 

-The unit cannot have another ‘door’ in front of the fridge door, this is incorrect installation and voids warranty

-The unit must be 100% away from sunlight and out of the weather, this is incorrect installation and voids warranty

 -Check compressor definitely comes ON

 -Check inner fan is going and that there is NO ice build up on the inner rear wall

-The temperature control can be found at the rear of the fridge on the right-hand side bottom corner behind the wire grill.  You will need a screwdriver to change it.  Best to leave it on the factory setting and adjust from there.  0 being the warmest and 6 being the coldest.