Got a Hotpoint FZA54 freezer (upright, 6 drawer, frost-free), which
keeps illuminating the over-temp light (suggesting the freezer aint
freezing). This usually happens if the door is opened for 30 seconds or
more, and will remain on for 1 hr; I've just noticed it's back on
without the freezer being opened all morning.

With the door closed, and the over-temp light on, you can hear the
compressor running, and the cold-air circulating fan motor spinning (so,
sounds electrically okay).


I've tried defrosting (the frost free) freezer, there was some water
that resulted (probably from humid air condensing when the door is opened.

Any hints and tips on this?, I'm next inclined to remove the ducting for
the cold-air circulation, to see if I can find the fan-motor and check
that that is actually driving the fan.

How would you check for low refrigerant in anything like this?
Presumably there'll be a low-temp coil in there that should be chuffin
cold to the touch?