flashing#4

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    Enviro M55 Cast, FPI

    Hello all, I am coming to my wits end. I have a 2015 Enviro M55 FPI, I bought this unit brand new and had installed in 2017, it has ran fine up until last season. I am getting a flashing #4 light on the unit, I have gone thru all possible troubleshooting for the flashing 4. I have replaced...