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    Pentair Mastertemp 300 control board and memory pad.

    Yes, I meant membrane keypad. Thank you for verifying I should order the 461105 board. Some places online still sell the discontinued board. I will order the kit that comes with the new model 8 pin membrane keypad. I wasted money on the keypad I just bought. That's life !
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    Pentair Mastertemp 300 control board and memory pad.

    I have a Pentair Mastertemp 300. The digital display backlight lights up, but does not display any numbers or error codes. I have replaced the memory pad, thermistor, and high limit switch. The heater runs and can be controlled by the memory pad for off and on, and it shows the small lights on...