Tmp display changes to default temp of 22 degree

Tmp display changes to default temp of 22 degree I have GE Monogram ZISS420NRJSS (mfg date 07/07). I notices that the ice in the freezer slowly started melting. The display temperature settings showed 22 degrees Celsius. I adjusted the temperature back down to a cooler setting on both sides ( fridge and freezer section) but after 7 seconds the display changed back to 22 Degree Celsius.