Upright freezer

My freezer was not freezing food completely. Manually defrosted, the lower part of the back was iced over, took the cover off and the coils completely iced. Thawed, cleaned and started again. The temp overnight is only 32-33. The coils are completly iced this again. Would this be the thermostat timer? I tried to look for this on my freezer but can’t locate. Please help.

Hi.

Check if the evaporator fan is running.

Simon.

Thank you but the evaporator fan is running.

Hi.

Locate the defrost timer behind the bottom grill and slowly turn the shaft CW until the compressor stops. After 5 minutes check if the defrost heater is on. If the defrost starts - replace the timer AP5985208

If not - check the bimetal thermostat for continuity AP6009312

Simon.