RP2100 - screen error code shows RP5 what does it mean
Their should be no RP5 but their is a PR5 or rather a PRS only on the desplay the S looks like a 5. this means low pressure and will usually be a dirty basket on the pump or a dirty filter. It could also be a problem in the pressure switch on the heater but more often than not it will be a clloged basket or filter.
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