I went to use my pool heater after a year or so and received a high limit switch error. The 130 degree switch was rotted out so I replaced it as well as the 150. I went to fire it up again and am getting the same error. The heater is only 3 years old and with the exception of the one high limit switch is very healthy looking both inside and out. Do I need to reset something? Any ideas would be a huge help.