Spa temperature dropping

[Susanj]

We had some family at our property and one night they went to  get in and the hot tub temp had dropped 10 degrees. The circuit apparently had tripped. Now I worry if that happened when nobody was there in winter, it could freeze and ruin it.  Has that happened to anyone? 

[Cusser]

This would be way over my technical expertise. but looks like their are Wifi temperature monitors available

https://www.google.com/search?q=wifi+temperature+monitor+for+spa&source=hp&ei=I3PIYfbeCNqt0PEP7JaWyAY&iflsig=ALs-wAMAAAAAYciBMwhU325SrbZ3hJgFFqdNHYIRgzlX&ved=0ahUKEwi2_Ov2zYH1AhXaFjQIHWyLBWkQ4dUDCAg&uact=5&oq=wifi+temperature+monitor+for+spa&gs_lcp=Cgdnd3Mtd2l6EAMyBggAEBYQHjIGCAAQFhAeMgYIABAWEB4yBggAEBYQHjIFCAAQhgMyBQgAEIYDOgUIABCRAjoKCAAQsQMQgwEQQzoRCC4QgAQQsQMQgwEQxwEQowI6BAgAEEM6CwgAEIAEELEDEIMBOg4ILhCABBCxAxDHARCjAjoICAAQsQMQgwE6BAguEEM6CAgAEIAEELEDOgcIABCxAxBDOgUIABCABDoJCAAQyQMQFhAeUABYi1RgtFhoAHAAeACAAbACiAGPHpIBCTE0LjE0LjEuMZgBAKABAQ&sclient=gws-wiz

[Susanj]

Thank you. I am wondering why this happens- what might cause it to trip , and how long it might take to freeze. 

[RDspaguy]

I replied to your other post. 

On a fully insulated tub on the ground you can go days with no damage, and the first things to freeze will be in the equipment area. On a deck you lose a day or 2. Not full-foam and it can freeze pipes in hours.

Gfci breakers trip for many reasons. Often it is the breaker itself, or loose connections on the breaker. Most things in the spa will trip it repeatedly, but not always. Nuisance tripping is the most difficult issue to troubleshoot in a spa.