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HONEYWELL S86U inernal error

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Paul_11
Paul_11 Member Posts: 210
in Gas Heating
I installed an S86U when I first installed a Peerless gas atmospheric boiler in 2013 & it lasted until 07/11/22. We had to replace it again on 10/04/22.

Nothing with the boiler has changed

Is this just a case of a bad S86U or could something else cause this?

I have searched this site and GOOGLE, but no one seems to have any good reasons
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Comments

  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 15,546
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    Nothing I know of. Hopefully it's under warranty. They don't make anything like they used to
  • EdTheHeaterMan
    EdTheHeaterMan Member Posts: 7,867
    edited October 2022
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    If it happens again... then it is not the control. Look for a chaffed wire or something that may be causing overcurrent. Did your customer add a smart thermostat just before the first failure?
    Could a staple in a wire you put in 2013 finally wear thru somewhere?
    Ware and tare. or is it spelled wear a tear Oh stop crying!

    Just pulling at straws here.

    Edward Young Retired

    After you make that expensive repair and you still have the same problem, What will you check next?

    mattmia2

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