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Rheem Error code pF. then 0f
My customer has a Rheem Platinum Performance Tankless water heater. Installation went smooth with no problems and has been running for about a month. Last night they experienced a power failure.. when the power came back on the display LED said 'pF'. which seems logical to mean power fail. Once reset, it displays '0f' or 'of', and turning it on/off, removing power does not clear that. I can't find reference to '0f' (or pF for that matter).
Does anyone know what this might mean? They'd really like to get their hot water back