low temp in freezer and fridge

temp dropped to 50 degrees and freezer dropped to 20 degrees tried to adjust with controls but did nothing what could be the problem.

Hi.

Please check if:

-evaporator fan runs
-condenser fan runs
-compressor runs
-evaporator coils blocked with snow

The model number you’ve posted is incorrect.

Post the results.

Simon.

Compresser was working coils had frost on them but the evaperator fan was not working and the condenser fan was working.

Compresser was working coils had frost on them but the evaperator fan was not working and the condenser fan was working. Was going to change evaperator fan but was not sure if I might have a problem with the mother board again.

Hi.

The recommendation is to replace both - the mother board and evaporator fan motor.
If you need the part numbers please provide the correct model number of the fridge.

Simon.