I have been trying to get my heater working reliably. I have been looking through this forum and was hoping for advice. The temperature in the display of the heater is showing much higher than the actual pool water temp. It more often than not reads above 104 and therefore cuts off the heat. I bought a new thermistor and hooked it up by removing the wires from the installed/old one and putting it on the new one just hanging in the open 60 degree air. The new probe also measures an inaccurate temp of 90-102. At some point there were rats in the unit and some wiring was damaged. I bought a new wiring harness and hooked the new thermistor with the new wires only (I did not replace any of the other wiring) but the problem still exists. Does this point to a bad control board? Anything else I can check?