Fridge temp higher than beer temp


#1

Good Morning! I started my first Brewpi & Lager fermentation on Saturday. Very excited!

Beertemp is + or - one tenth of a degree (50° F) but I am a little puzzled why the fridge temp never gets as low as the beer temp.

This is a 4.4 cu ft mini fridge with an arduino+sainsmart relays with an electric heating pad for heat. All Brewpi settings at default, except the beer profile.

Thanks!
Katherine


#2

Apparently, this is the fridge temperature that is needed to keep the beer temperature at the setpoint. BrewPi will adjust the fridge setpoint to achieve the right beer temperature.

I think this is happening because your fermenter is close to the back of the fridge, so it is cooled directly a bit, instead of via the fridge air.


#3

Thanks Elco, seems to be working perfectly.

I have the temp probe in a thermowell, but the wire runs up the back of the fridge near the chiller. Do you think it is possible that the beer probe wire is having a chilling effect on the beer?

-k


#4

No all signals are digital. Where your beer is sitting is probably just a bit colder than where the fridge probe is.