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gas fired hot water boiler won't turn off even when thermostat is in off position

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armintunde
armintunde Member Posts: 2
in Gas Heating
I'm having this weird situation where my gas fired boiler can only be turned off from the main switch. Boiler does not respond to the thermostat. Thermostat was checked it is ok. Suspect the limit switch or the zone valve relay. Any opinions?

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  • BobC
    BobC Member Posts: 5,478
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    Did they try disconnecting the thermostat wires AT THE BOILER? If they didn't, it could be a short in the thermostat wire.

    Bob
    Smith G8-3 with EZ Gas @ 90,000 BTU, Single pipe steam
    Vaporstat with a 12oz cut-out and 4oz cut-in
    3PSI gauge
  • armintunde
    armintunde Member Posts: 2
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    yes that was also checked
  • BobC
    BobC Member Posts: 5,478
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    What make and model of boiler?

    Bob
    Smith G8-3 with EZ Gas @ 90,000 BTU, Single pipe steam
    Vaporstat with a 12oz cut-out and 4oz cut-in
    3PSI gauge
  • j a_2
    j a_2 Member Posts: 1,801
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    Take a look at the aqua stat,,
  • j a_2
    j a_2 Member Posts: 1,801
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    Please don't say u paid someone to fix it and they couldn't....honestly it should take a tech approx. 2 min. To find the cause
  • j a_2
    j a_2 Member Posts: 1,801
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    Hatterasguy said:

    j a said:

    Please don't say u paid someone to fix it and they couldn't....honestly it should take a tech approx. 2 min. To find the cause

    Don't say you're actually surprised JA.............
    Well, nothing surprises me anymore...but I'll be vert surprised if the Giants beat the pats today. Lol

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