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error codes

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rockd
rockd Member Posts: 1
in THE MAIN WALL
E21 error code on peerless purefire boiler. This code keeps coming up , not much experience with residential boilers. We mainly do big commercial, can someone help?

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  • Tim McElwain
    Tim McElwain Member Posts: 4,657
    The E-21 on that

    boiler indicates that the 120 VAC polarity is reversed. Has any electrical work been done? If you google Peerless PureFire it will bring you to there I and O manual with all the different codes and procedures.
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