William Kerry posted an answer for this Pentair Mastertemp Heater:
"Your problem sounds like a faulty control board. I replaced the high limit switch, the..."
William Kerry posted a question about Pentair Mastertemp Heater:
"Heater reaches within 1 degree of desired temp then cycles on and off every 20 seconds. I..."
William Kerry posted a question about Pentair Pool & Spa:
"Spa heater. MasterTemp 200. 3 years old. No salt system in use. Worked fine until 2..."