I have an Envoy that is just over a year old. Everything has worked flawlessly, however, today when I went out to check the water the temp reading was up at 107. I keep it at 104, which is also the max it will let me set it to, and the hottest I've ever seen it is 105. Any ideas what could be wrong? I've never had my temp be more than 1 degree off of set temp. The spa hasn't been used for a week (covid), and the temp was spot on during the last use. My dealer said to flip the breaker and see if the temp comes back down over the next couple days, but I would assume something caused the rise.