Keezer Temp Control Issue (Johnson Controls A419)

Bought a well-made Keezer off marketplace, so I’m new to the game. The previous owner (builder) had installed the Johnson Controls A419 when constructing. It was working fine for the first couple weeks. All of sudden (after a power outage - but it’s plugged into a GFI outlet), it stopped keeping the keezer at a steady 34 degrees. It dropped dramatically and froze the leftover swagg of a couple corny kegs I had stored in there until I had time to clean them. Now that I have kegged my first beer, I need to make sure the Keezer is keeping it at a consistent temperature and that’s NOT the case at all.

It is set on a 12 minute delay and all controls seem to be functioning properly. The temp probe is hanging and not touching anything inside the keezer. I have the SP set to 35 degrees and it has been spending a lot of its time in the low 30’s. It has had overnight to correct itself, but it’s still giving me 32 degrees when I need it at 35. I followed the manual to set the SP correctly and to make sure the ASD is at 12 minutes. Any help from fellow A419 owners would be greatly appreciated. Thank you.

Replace it with an Inkbird. They’re inexpensive (under $30) and easier to program imho.

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I think I figured it out! The DIF reset to plus/minus 4 degrees. I switched it to 1 and it seems to be working! Thanks.

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