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A.O smith water heater issue.

nytech28
nytech28 Member Posts: 70
in Domestic Hot Water
I have domestic hot water heater , it ignites but no flame all other safetys are good , can this be a thermostat issue ? also I would like to attach few pictures of the job , & would aprecaite if I am explained how the plumbing is connected & cause of the no flame , plz update 

Comments

  • Larry Weingarten
    Larry Weingarten Member Posts: 3,593
    Hi, Does the vent fan ever run?

    Tours, Larry
  • nytech28
    nytech28 Member Posts: 70
    yes the fan does run , air flow switch is closed & high limit switch
  • Larry Weingarten
    Larry Weingarten Member Posts: 3,593
    edited October 2023
    Hi, It is sounding like the gas control to me, but have you contacted AO Smith and/or White Rodgers? Maybe they have some clues 😏

    Yours, Larry
  • hot_rod
    hot_rod Member Posts: 23,388
    On your list of to-dos
    It looks like the circulator pump in the pic is mounted upside down?

    This water heater is running a hydronic system?
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • nytech28
    nytech28 Member Posts: 70
    Larry Weingarten said:
    Hi, It is sounding like the gas control to me, but have you contacted AO Smith and/or White Rodgers? Maybe they have some clues 😏 Yours, Larry
    it's the gas valve & I have contacted A.O smith already.
  • nytech28
    nytech28 Member Posts: 70
    hot_rod said:
    On your list of to-dos
    It looks like the circulator pump in the pic is mounted upside down?

    This water heater is running a hydronic system?
    to my understanding so far it's just being used as demostic hot water , as for the plumbing side of the system I will draw a diagram & attach & suggestion would be apreciated. 
  • hot_rod
    hot_rod Member Posts: 23,388
    This pump here is mounted upside down. It looks to be cast iron and the flanges also. If it is the hot water recirc it should all be brass or stainless.
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • nytech28
    nytech28 Member Posts: 70
    update I got the hot water running , issue was the thermostat/ gas vavle . thanks for looking into this
  • Larry Weingarten
    Larry Weingarten Member Posts: 3,593
    Hi @nytech28 , Good you got it running. What was the issue with the gas valve? Field serviceable? Thanks!

    Yours, Larry
  • nytech28
    nytech28 Member Posts: 70
    Larry Weingarten said:
    Hi @nytech28 , Good you got it running. What was the issue with the gas valve? Field serviceable? Thanks! Yours, Larry
    the gas valve was defective , no error codes or response , don't think it was field serviceable I just installed new vavle & kidos in class is getting hot water on there bathroom.
    Larry Weingarten

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