THE FRIGDE IS TOO WARM.

The part number you need is going to be WR09X10050. This is for the damper assembly, but while you are at it change out part number WR55X10150. this is the part that controls the damper and more than likely if one fails the other will be soon to follow

If you need further help, I’m available over the phone at https://www.6ya.com/expert/jason_4570d45317834dd3

the freezer should be arond -20 degrees celcius and the fridge aroud 5 degrees celcius
There could be a problem with air flow
the fan in the freezer has probably stopped or the air flow into the fridge is probably blocked
You could have a defrost problem. this would allow ice to build up in the freezer blocking off ai flow.
A technician can help you with that

Every time I select my fridge and freezer temperature from -16 and 3 degrees C respectively it keeps on going back to 20 and 18 degree C. Please assist.

it proberbly has slow gas leakage get it toped up with gas and the leakage points must be traced and sealed

defrost it a couple hours and make sure its no higher than 3-4 on temp dial

the freezer needs defrosting or the evaporator fan has failed and is not blowing air into the refrigerator side.

Side by side cooling units usually have 2 compressors, one for the freezer and one for the refrigerator. The refrigerator compressor may be bad, or not pulling enough power, or there may have been a leak in the tubing that the compressor uses to cool the unit with. To diagnose the problem, be aware of the noises the unit makes, and check to make sure it is a 2 compressor unit. If you only hear one compressor running then your compressor is bad, if you hear one running too often, then your tubing is bad, if the back of the refrigerator side is warm but the inside is not cooling down, then the compressor is not drawing enough power. Keep in mind that the radiant heat from the operational (presumably) freezer side may cause the refrigerator side to appear warm. (usually there is a type of wire backing with tubes running along it, these tubes should be mildly warm.)

The adaptive derost control has gone bad a very common issue. It will work a couple of weeks before its back to its frosting over. It just plugs in but to get to it you must remove the controls at top of frigde section in the back right corner held in by two scewrs.

How old is this frig? If it is older that 12-15 years, get a new one. Make sure there is not blockage to keep the air from circulating properly. The vent from the freezer to the cooler should also be free from blockage as well.

check the evaporator fan motor, behind the back wall of the freezer. If that is turning check if the damper is opening, top lt of the refrigerator compartment. I hope this helps you.