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My heating is not working possible Low water cut off device

eddyy Member Posts: 2
Hi, im a novice in heating but i have a williamson -thermoflo gwa and for some reason when i call for heat nothing fires up. i can see the flame on in the burner but nothing will turn on. the lights on my low water gaurd dog rb-24 are not on. usually its green or red but no lights. could it be that i have to replace the gaurd dog because it shorted?


  • Paul48
    Paul48 Member Posts: 4,469
    No Lights

    Not getting 24 volts, most likely. Probably a bad transformer, but it needs to be checked out.
  • eddyy
    eddyy Member Posts: 2
    No lights

    Yea i was thinking that there might not be any power going through, because i have 2 of these low water cut offs, one for the hot water going away and one from the returning. both devices have no lights on. I'll try using my electric pen to test if there is any voltage there.
  • unclejohn
    unclejohn Member Posts: 1,810
    What do you

    Mean "You can see the flame on " But nothing fires up? Is there a flame or isn't there?
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