I have a Raypak RP2100 Gas Pool Heater. When I try to heat my spa, the heater works for about 20 minutes when it shuts off itself but before the set temperature is reached. The water is heated up from 84F to 90F, but well short of 96F set point. The strange thing is that it shuts off the power to the controller so the LCD display goes dark and I cannot restart it. Turning off/on the power switch cannot bring the controller back to life till next morning.

What's going on here? Could it be a faulty Hi limit switch?? Could someone help, PLEASE?! -Jeff

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