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Pentair Pool Heater Error Codes: Meanings & Safe Checks
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126 Pentair pool heater 126 means Shorted water temperature sensor. See the verified model scope, safe checks, and official source. Search/display variants: 126 caution E01 Pentair pool heater E01 means Open water temperature sensor. See the verified model scope, safe checks, and official source. Search/display variants: E01 caution E05 Pentair pool heater E05 means Open stack flue sensor. See the verified model scope, safe checks, and official source. Search/display variants: E05 caution E06 Pentair pool heater E06 means Shorted stack flue sensor. See the verified model scope, safe checks, and official source. Search/display variants: E06 caution ERR AFS Pentair pool heater ERR AFS means Air flow switch open: the blower is not on, or air through it is being restricted. Search/display variants: ERR AFS, ERRAFS caution ERR AGS Pentair pool heater ERR AGS means Automatic gas shutoff: water temperature after the second pass through the heat exchanger is more than 140 degrees F. Search/display variants: ERR AGS, ERRAGS caution ERR HLS Pentair pool heater ERR HLS means Hi temperature limit switch open: water temperature after the first pass through the heater exchanger is more than 135… Search/display variants: ERR HLS, ERRHLS caution ERR IGN Pentair pool heater ERR IGN means Ignition Control Module was not able to ignite the heater. Search/display variants: ERR IGN, ERRIGN caution ERR PS Pentair pool heater ERR PS means Water pressure switch open: no water flow through the heater. Search/display variants: ERR PS, ERRPS caution ERR SFS Pentair pool heater ERR SFS means Excessive stack flue temperature: the temperature of the stack flue is more than 480 degrees F. Search/display variants: ERR SFS, ERRSFS caution