Verified manufacturer-source collection
Pentair Pool Heater Error Codes
Choose the code exactly as shown. Meanings and reset procedures can change across model families, display formats and markets.
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126 Official Pentair material describes 126 as Shorted water temperature sensor. This guide records the cited product-family scope, safety-reviewed owner checks, and service limits.
Search/display variants: 126 caution E01 Official Pentair material describes E01 as Open water temperature sensor. This guide records the cited product-family scope, safety-reviewed owner checks, and service limits.
Search/display variants: E01 caution E05 Official Pentair material describes E05 as Open stack flue sensor. This guide records the cited product-family scope, safety-reviewed owner checks, and service limits.
Search/display variants: E05 caution E06 Official Pentair material describes E06 as Shorted stack flue sensor. This guide records the cited product-family scope, safety-reviewed owner checks, and service limits.
Search/display variants: E06 caution ERR AFS Official Pentair material describes ERR AFS as Air flow switch open: the blower is not on, or air through it is being restricted. This guide records the cited product-family scope, safety-reviewed owner checks, and service limits.
Search/display variants: ERR AFS, ERRAFS caution ERR AGS Official Pentair material describes ERR AGS as Automatic gas shutoff: water temperature after the second pass through the heat exchanger is more than 140 degrees F. This guide records the cited product-family scope, safety-reviewed owner checks, and service limits.
Search/display variants: ERR AGS, ERRAGS caution ERR HLS Official Pentair material describes ERR HLS as Hi temperature limit switch open: water temperature after the first pass through the heater exchanger is more than 135 degrees F. This guide records the cited product-family scope, safety-reviewed owner checks, and service limits.
Search/display variants: ERR HLS, ERRHLS caution ERR IGN Official Pentair material describes ERR IGN as Ignition Control Module was not able to ignite the heater. This guide records the cited product-family scope, safety-reviewed owner checks, and service limits.
Search/display variants: ERR IGN, ERRIGN caution ERR PS Official Pentair material describes ERR PS as Water pressure switch open: no water flow through the heater. This guide records the cited product-family scope, safety-reviewed owner checks, and service limits.
Search/display variants: ERR PS, ERRPS caution ERR SFS Official Pentair material describes ERR SFS as Excessive stack flue temperature: the temperature of the stack flue is more than 480 degrees F. This guide records the cited product-family scope, safety-reviewed owner checks, and service limits.
Search/display variants: ERR SFS, ERRSFS caution