Rich-nh

Everything is back in place and the tub has been running/heating for about the last 90 minutes. FYI - I did drain the tub to take my time and make the replacements easier. The temp sensor replacement was very simple. My 2007 Cameo does not have a long tube to snake the wire thru - it's very short. Don't forget to order the o-ring when you order the sensor. The Hi Limit sensor was a little trickier. My tub is 13 years old and I don't really want to disconnect hose clamps and hoses if I really don't have to. So I unbolted the heater from the control box and twisted it a little to work on it. I read a review when I bought the sensor that it was slightly lower diameter than original and some silicon caulk would be necessary to hold it in place. There was already a blob of caulk around my sensor. I replaced it and loaded it up with caulk and let it sit for a day to cure. Basically, it's a very small and awkward-to-access space. I bolted the heater back on and connected the sensors this morning and fired it up. All seems well - it's heating and I don't see any leaks. Thank you for the help. Another lesson learned on fixing this tub.

Both sensors are in hand. Thoughts on splicing the wire for the temp sensor rather than snaking the whole new wire through the tubing?

Will do. Thanks tremendously.

Took both readings. The sensor on the end of the connector - pins 1 and 3 - measures 28.5Kohms. The next sensor inward in the connector - pins 2 and 4 - measures 21.2Kohms. With those being 7Kohms apart, sounds like I have at least one bad sensor. Neither has ever been replaced.

3 photos are attached - different angles of the circuit board.

UPDATE, less than an hour later - I checked on the tub and the temp was reading 84 (set at 82) and the circulation pump was not running. As luck would have it, the circulation pump turned on while I was standing there and I watched the temp reading fall to 75. The heater then came on - I felt it in the water - and after about another 90 seconds, I watched the temp display rise to 85 again. Heater display went off and about a minute later, the circulation stopped again.

I removed the filter and repowered the tub this morning and it came up fine. Temp set to 82 and started at 74. Circulation pump working fine. After about an hour, I checked in and the temp was reading 88 and the circulation pump was not running. And I do have an ohm meter.

I went to put chemicals in my 2007 Cameo 880 this morning. The water was cold and display showed the watchdog error ————. i cycled power and when it came back up, the temp said 103 and was set to 97. I’d be surprised if the actual temperature was over 75. Also, there was no circulation pump running. I tried both pumps and they worked. I looked at the flow switch and it was working I shut down the power for a couple hours and then powered up again. This time, the circulator pump came right up. I set the temp to 82 and it was reading about 75. Everything looked normal and the heater was showing that it was on too. About an hour later, I checked in and the temp was now reading 95 (water was still cold) and circulation pump was no longer running. My flow switch is about 2 months old. My circulation pump is about a year old. Is this a temp sensor problem? Anybody have any thoughts on what needs to be replaced or fixed? Thanks Rich