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How low temp should a 3 way fridge go?

PostPosted:Sat Jan 05, 2019 1:54 pm
by AaronM
Hey guys,

Just wondering how cold do 3 way fridges generally go? I went away on my first trip in the last fortnight and we were running the fridge on 230v power. Put it to as cold as it could go on the thermostat but found it didn't chill our drinks too much, just a little. No where near what our house fridge does anyway :)

Is this normal? The freezer part was working well and froze items but found the fridge was just chilling the drinks a little and not making cans really cold etc

Re: How low temp should a 3 way fridge go?

PostPosted:Sat Jan 05, 2019 3:15 pm
by mattn
Very normal - on 240V, my 3Way, without the computer fan, reads over 10degrees when its 30 outside. With the the fan it drops 2 or 4 degrees cooler. Most 3Ways work better on Gas, but they still struggle to maintain cool temperatures.

3Way fridges are rates for the climate. Climate classes are

SN = Subnormal: suitable for use in ambient temperatures of +10°C to +32°C
N = Normal: suitable for use in ambient temperatures of +16°C to +32°C
ST =Subtropical: suitable for use in ambient temperatures of +16°C to +38°C
T = Tropical: suitable for use in ambient temperatures of +16°C to +43°C

In practice in New Zealand you really need a minimum of ST, ideally T rating.

Re: How low temp should a 3 way fridge go?

PostPosted:Sat Jan 05, 2019 8:50 pm
by AaronM
Thanks for the reply!

You use a fan? How does that work?

Re: How low temp should a 3 way fridge go?

PostPosted:Sun Jan 06, 2019 7:33 am
by mattn
Common thing people do is install a small fan in the back of the fridge. This forces airflow over the hot bits and gets them cooler. You can buy 'kits' from RV suppliers, but most of us use a Computer fan that are cheap and 12V.

viewtopic.php?t=12886 is a good starting point - although note my post - I believe a thermostat is overkill. Just have a switch to turn it off and on manually.

Re: How low temp should a 3 way fridge go?

PostPosted:Sun Jan 06, 2019 6:50 pm
by Holistic Palace
We chill our 3 way fridge for 24hrs on power before we head away, have found the freezer cools down faster than the fridge
Once at temp, the freezer is around minus 13 & the fridge around 4deg, depending on the fridge setting & how full the fridge is. This does not seem to affect the temp in the freezer with either full or part empty
When we are away & on gas, the fridge / freezer tends to be colder on the same setting than we had it when on power