General Category > Equipment and Software
I Really Need Help with my Johnson Controls A419.
tschmidlin:
I would guess it's probe location. You're in the center of the space, and the cooling is coming from the walls. By the time it hits 63 in the center the walls are much colder, so it drops further as the heat evens out in the space.
First, put some stuff in it - an empty space like that makes the compressor work much harder. At the very least put some water jugs in there. The more stuff in the space the more it will even out.
Don't put the probe in water to begin with, that will just make it worse because you're waiting for the freezer to suck the heat out of the walls, which pulls it from the air, which pulls it from the water until the water gets cold enough. That's going to take a long time and the walls will be even colder.
Basically, put stuff in it and leave it alone. Given time it will even out and it will work as expected.
narvin:
Air temperature is going to fluctuate very quickly. The walls will stay cold after the freezer shuts off, cooling air near the sides and causing convection currents that show fluctuations on your probe reading. Even with a fan to even things out, you're never going to be able to keep the air temperature around 63 without cycling the freezer on and off constantly, and this will break your freezer pretty quickly.
You don't care about air temperature; you want to maintain the temperature of your beer, so tape the probe to the side of your carboy (or use a thermowell). 5 gallons of liquid has a lot more thermal mass, so the freezer will run for longer periods of time and then shut off for longer, and your beer temperature should only fluctuate 1 or 2 degrees.
beersk:
Is there a reason why you'd want your freezer on the coldest setting versus the warmest?
EHall:
Sometimes I need help with my johnson control too... ;)
patrickswayze:
--- Quote from: beersk on July 12, 2012, 07:41:38 AM ---Is there a reason why you'd want your freezer on the coldest setting versus the warmest?
--- End quote ---
Not sure if this was for me but i have it on the warmest setting possible
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version