Obviously hot weather has freezer running a bit more. After noticing that our built in kitchen freezer seemed to be almost permanently on, I decided to defrost it last night.

After wiping it out at 10 this morning, I switched it back on and by 11 it was down to -7, and now it's just reached -18.3 (according to an external thermometer with the probe in the centre).

It's still running ... at what temperature should it cut out ?

The dial is set to "1" from a possible "4" (and the super/fast freeze feature is off.