I turned on my pool heater today to heat up the pool and when I went to shut it off it would't. None of the buttons are functioning but the heater is still working. The LED is still functioning as the temp shows and changes as the pool heats up. All the buttons feel fine. The only way it will shut off is when the pump is off. And I can't switch from pool to spa so I can't heat the spa over the temperature I set for the pool which was 80. Please help, I can't find any topics online for this.