I have a Jacuzzi 345, and I've only had the tub about a year, but I've never seen this happen before. I was doing my normal weekly maintenance yesterday, and I popped off the cover, and the readout read 106...I normally keep the temp set at 100. We finally got some spring here in Michigan, and it got up to around 80, but it's gotten hotter than that last summer. Honestly in the year I've owned the tub, I've never seen the readout go over 104. In fact, I didn't think it could. In reading the manual, it says if it gets too hot, there will be an "OH" message on the readout. Since there wasn't that, and it just read 106, I was confused. So I just removed the cover, and let it breathe for a while. It's finally back down around the 100 degree setting.
My question is, is it normal to have a 5 or 6 degree fluxuation in temp? Like I said, throughout the year I've owned it, I've never seen it vary that far from the set temp (100). Thoughts?