My heater is acting up. Up to Saturday it was working, but now it not allowing me to change the temperature up. I can lower, but not increase the temperature not even to where the current water temperature is. I have tried unplugging the unit, wait and tried again, but did nothing. Its control is on the display, it doe not control anything other than the pool, and it is probably about 10 years old or more. When we moved into the house the unit was already there and we have been here for 9 years.
Any ideas, suggestions, and questions are welcome. Thanks.