Don Klipstein writes:

Amount of electrical energy to pump a given amount of heat energy
from
indoors to outdoors is about 1/3 of the heat energy. Ideally the
ratio is 3.41 divided by EER of the air conditioner.

That's true, at least for air conditioning serving a small delta T of
indoors to outdoors. Not so efficient when delta T is many times
larger, going from 0 deg F freezer to warm outdoors. Think about why
heat pumps for home heating aren't used when it is the mirror image of
refrigeration, with 0 deg F outside and room temp inside.

And heat energy output of a fridge is same as electrical energy
consumption of the fridge, plus only a tiny bit more for heat coming
out for items going in warmer than they are coming out - it's close
enough to equal to the electrical energy going into the fridge.

Conservation of energy of course applies. But if you consider the
multiple heat cycles that exposed water in the freezer goes through
(chill/freeze/sublimate/condense/freeze/defrost/evaporate/condense),
you'll understand why the electric energy consumed per BTU spoils the
3:1 rule of thumb. And why it's not therefore in the DOE test.

You can easily prove this to yourself with a duty cycle meter on your
refrigerator/freezer, and measuring while making and storing ice, versus
icemaker off and no exposed ice. In my experience you go from running
constantly while ice is being made to running quite intermittently when
there is no icemaking or exposed ice. A puddle of liquid water in a
freezer is like a campfire in there, pushing the temp towards 32 deg F
when the freezer wants to shut off at 0 deg F.