The message
from "L Reid" contains these words:

hence the minimum 15 deg ambiant temperature requirement to ensure the
refridgerant vaporises when it leaves the freezer compartment.

The refrigerant is supposed to evaporate inside the cold compartment -
that's how they work. The refrigerant draws the energy needed to go from
liquid to gas from the heat in the bit you're trying to cool.

If you were to evaporate the liquid elsewhere you'd get lumps of ice
forming outside the compartment at whatever point it's mistakenly doing
it.

--
Skipweasel
Pay no attention to that man behind the curtain.