Jason, I see you haven't had a lot of replies to this question. Yes! I've hit this issue in the past 48 hours. At first I thought it was only occurring on AC power but later I found the same thing with LP. It's also been somewhat intermittent. After several hours seeing temps in the range of 40+ degrees, it will cool back down to the low 30's. I contacted Norcold who said "it's a bad thermistor" so I picked one up for $25 and replaced it. It's a 2 minute job. Now the wait is on to see if it corrects my problem. BTW, the freezer works fine.
Mike, Sue, Sissy and Little Man
2015 Ford F350 Lariat FX4 6.7 CC DRW
2015 Eagle Premier 351RSTS