On Tue, 26 Jul 2016 09:29:03 +0000, AnthonyL wrote:
Just wondering about something.
There is a known problem with fridge/freezers with only one compressor,
when they are somewhere cold.
Because they rely on the fridge thermostat to start the compressor, if the
fridge doesn't need cooling (temperature inside similar to temperature
outside) then the compressor doesn't run and the freezer defrosts. Had
that happen to us once when the fridge/freezer was in the garage over a
very cold winter.
I'm now trying to work out if there is a similar effect in very warm
weather. If the fridge is cooling more efficiently than the freezer, such
that the compressor doesn't run for long enough to get the freezer
temperature down, then possibly the freezer might not be able to keep cold
I see that you've tried running the fridge colder but only got the freezer
down to -10C. You didn't say how cold it was before you made the
adjustment. If you turn the thermostat to max cold and the freezer goes
below -10C this might be a pointer.
I wasn't really aware that there was a problem until SWIMBO commented
that the ice cream was soft so I think at least until the recent warm
spell that all was ok with the thermostat unchanged from its setting
of 3. So I assume that until recently we were at around -18 to -20
for the freezer and +6 or so for the fridge which is what I would
Anyway its all switched on now so we'll see how it is by the evening.
My stand-by freezer has been working fine at around -20 despite not
having been on since Xmas. But that is a fairly uncomplicated unit
with no fancy auto-defrost/frost free to go wrong.
On Tue, 26 Jul 2016 13:42:42 GMT, firstname.lastname@example.org (AnthonyL)
An update and more questions. Fridge/Freezer has been working fine
for a week now. Initially I had the thermostat set at 6 (max) but
that was too cold, down to 5, still very cold and now at 4 so fridge
is at 8c, freezer -20c and seems to have fairly normal on/off cycles.
So I'm not clear on what went wrong and what fixed it.
When I moved the unit out there was a terrible mess underneath - crud
+ maggots which smelt revolting when some of the evaporator tray
contents spilt over. The previous owners had a dog so I suspect some
food got under there. It was enough to impede air flow but I would
have thought there was enough space elsewhere.
The other thought is that I didn't turn the thermostat to cooler in
the heatwave we had so it was still on 3 when getting on for 5 might
have been more appropriate. I can see that this might have caused a
partial defrost but I don't see why it should clog the system us as
per my OP (at the top).
I'm just looking at how to prevent the problem re-arising. Or maybe
the thing just needs a twice yearly manual defrost?
I don't think this is true of modern ones, although it was certainly
the case with the early ones.
More modern refrigerants are not as wide temperature ranging as
the banned CFC's were, which does also impose more limited operating
temperature ranges on freezers than used to be the case, but this is
not because of single thermostat/compressor fridge/freezer designs.
[email address is not usable -- followup in the newsgroup]
They only thing I'd suggest is to look for cracks in the inside of the
fridge that might have let water into the insulation and saturated it, if
that is the case then its pretty terminal in my experience.
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