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  1. Mlccdavis

    Repair or replace heater

    I have a 10+ year old Hayward H400FDN heater that is showing a CE error code. I had it looked by a local pool company and they tested the comm cable and the heater still showed the error so the board(s) are most likely bad. Since the heater is 10+ years old and it had mice living in it at some...