RP wrote:
wrote:

RP wrote:


It won't even cycle on in sub-freezing weather...

It might, with an old refrigerator thermostat in the freezer and
a Thermocube in the fridge that light a 100 W bulb in the fridge

if the freezer rises to 20 F... or the fridge falls to 35 (to avoid

freezing the fridge contents.) Will this hurt the compressor?


http://www.countrysupply.com/products/sku-BEW19.html


That's pretty neat, but it won't help out with the subfreezing condenser
air. Somehow I doubt that a fan cycle control is a viable option


So subfreezing condenser air might hurt the compressor, and controlling
the fan duty cycle to keep the hot coil above freezing might avoid that?

It might, that is, if you could insulate the coil from the ambient
environment during the off cycle. It's doable, but it would be an
engineering nightmare on a stock domestic refrigerator. Refrigerators
take awhile to stabilize running pressures, so starting with a
subfreezing condenser coil might mean that the cycle finishes before the
head control even has a chance to takes control. Head Masters, or
equivalent devices, are installed on commercial refrigeration systems in
order to simulate higher ambients. Without head pressure control, when
the condenser gets too cold the head pressure will drop to such a level
that the evaporator will be starved of refrigerant, even with a TXV in
place, and as a result and superheat will escalate. The evaporator and
compressor are starved of refrigerant. Turtle had it exactly wrong;
flooding back is assured not to happen.

hvacrmedic

this is Turtle.

Richard your walking on thin ice here with refrigetator not coming on
in sub freezing ambiants. Before you step too much farther off in to it
, there is a good number of dual thermostat controlled thermostats in
refrigertators and they will be coming on and off all the way down to
ambiants of zero F or below.

now here is another lesson for you and CB to know and not try to guess
at the answers when whirlpool does have a opinion which i would take
before your words. You say a refrigerator can't have flood back when
and if you would read the installation instruction for the
refrigerators today. they will state that you should not run a
refrigerator in below 40 degree F ambiants for the fear of liquid freon
from forming in the compressor and when it turns on it will flood the
cyclinders with liquid and wash the oil out of the compressor. i know
this does not call it flood bad of the compressor but i would call it
that it was pretty damn close to the same thing.

Now that you and Cb got burned on this one , i would like you to try to
keep to answering the questions of the posters and not try to degrade
one of the member for personal pleasure. also i know you two don't work
on these frigerators for you would not have walked off into this one so
easy. OH , Richard i have work on these things for a living for years
with a BIG S .

TURTLE