Scrufnut

PreservedSwine, Thanks for your response. I live in VA and we haven't gotten to the point where day/night temps are affecting the tub temperatures. It's usually in July/August when we open the tub up at night to cool down. Actually it is the heater that's getting it hot, with the thermostat set to 103, the water temp at 106, heated water was still coming from the floor port. Looking at all the other responses, I have had this tub for 9 years and my thermostat has been very accurate, plus I measure it against an electronnic thermometer. I was thinking that either the thermister or the tub's control board has a problem. I am out of town this week so have shut off power to the heater so as not to cause further damage. When I return, I will completely shut down power in hopes of maybe resetting the control board if its hung up in anyway. Any other thoughts?

I own a 2002 Tiger River "Bengal". Today we are experiencing a condition where the water temperature has actually overshot the "set" temperature by 3+ degrees. Its been two months since changing the water so its not like its heating it from cold water. Normally keep the tub at 103 in the winter. Since the temperature indicator light was out, I starting stepping the temp setting up until the light came on; it did so at 104 (being the low end). The light stays on for 5 steps of the temp setting, so that meant the water was at ~106 (being the mid-point). I've read plenty of articles where there was no heat,nothing yet for too much heat. Anyone have any ideas?