Thanks for the reply.
Ceta fridge freezer.
No manual. Barcode sticker within fridge section: A320600CA13052036.
Complete thermostat part located within fridge ceiling light fitting replaced.
Guessing what was in place was manufacturer spec.
WDF20T-100-024
D1303P1B1
Replaced with as like for like as I could find via supplier.
Neither old nor new would ‘click off’ even after being set at highest setting for a period, then turning down. Unless turned to zero, then switches off completely.
As if thermostat is not recognising the temperature and fridge stays on continually.
Tried to upload photo, but exceeded upload limit.
Hope this helps. Cheers