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Gas boiler. It's a HB smith

Jpat123
Jpat123 Member Posts: 7

Hi everyone i have a Gas boiler that comes on burns for 20 minutes 

Then goes out and don't come back on 

I changed the board and the thermocouple 

It came on for a awhile and shut down and will mot come change out the board twice 

Comments

  • pedmec
    pedmec Member Posts: 968
    when you say does not comeback on what do you specifically mean? what kind of boiler are we talking about here?
  • EdTheHeaterMan
    EdTheHeaterMan Member Posts: 7,817
    edited February 11
    Is there a control that is locking out for some safety or other reason that needs to be reset? There are many gas boiler controls that will "RESET" by cycling off the power to the control. Does this sound like your problem? When did the problem start? Does turning the power off and back on get the burner to light? What is the model number of the boiler or perhaps the burner control?

    Does your gas valve use a standing pilot? (constant pilot flame burning ignition)
    Is there an ignition control that lights the pilot each time the burner lights?
    Edward F Young. Retired HVAC ContractorSpecialized in Residential Oil Burner and Hydronics
  • Jpat123
    Jpat123 Member Posts: 7
    I have a HB smith  boiler  model number  G100-w-6 con     it use to work if I cut the power off and back on then it completely stopped  that's when I replaced the thermocouple  and the board  it work for 20  minutes  the it went out I still had a flame on the pilot  but no burners  found out the board was no good again  now the same thing has happened 

  • Jpat123
    Jpat123 Member Posts: 7
    Yes a  standing pilot 
  • Steamhead
    Steamhead Member Posts: 16,821
    What "board" did you replace?
    All Steamed Up, Inc.
    Towson, MD, USA
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service
    Consulting
  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 15,510
    By "board" do you mean the ignition control?
  • EdTheHeaterMan
    EdTheHeaterMan Member Posts: 7,817
    Jpat123 said:

    I have a HB smith  boiler  model number  G100-w-6 con     it use to work if I cut the power off and back on then it completely stopped  that's when I replaced the thermocouple  and the board  it work for 20  minutes  the it went out I still had a flame on the pilot  but no burners  found out the board was no good again  now the same thing has happened 



    If the gray box is "the board" then you must have something wired incorrectly. Those Honeywell Aquastats should last for over 20 years in most heaters. even longer...

    Can you tale a picture of what you re calling "the board" with the cover off so we can see the wires inside?

    Edward F Young. Retired HVAC ContractorSpecialized in Residential Oil Burner and Hydronics
  • Jpat123
    Jpat123 Member Posts: 7
    edited February 13

    The control board 

  • mattmia2
    mattmia2 Member Posts: 9,622
    This has no control board, it has a bunch of safeties and operating controls wired together point to point.
  • mattmia2
    mattmia2 Member Posts: 9,622
    1. You should get someone to clean this and test the safeties, though a gas boiler arguably doesn't need annual service like an oil burner, it still needs to be cleaned and tested from time to time and this is over due.

    2. What thermostat is controlling this? Does it stay on if you jumper the thermostat connection, usually T-T?
  • Jpat123
    Jpat123 Member Posts: 7
    I just bye passed the 2 safety switches and its currently working  I am gonna go purchase new ones and see if that's the problem . 

    Waher
  • mattmia2
    mattmia2 Member Posts: 9,622
    DO NOT OPERATE THE BOILER AND CALL A COMPETENT PROFESSIONAL IF THAT IS HAPPENING. The safeties are almost certainly doing their job and you have spill or rollout both of which could kill you.
    Waher
  • HVACNUT
    HVACNUT Member Posts: 5,828
    Jpat123 said:
    I just bye passed the 2 safety switches and its currently working  I am gonna go purchase new ones and see if that's the problem . 

    I'll dial 9-1, and when you say go, I'll hit the other 1. Got your hard hat on? Clean undies?
    jimna01
  • Jamie Hall
    Jamie Hall Member Posts: 23,270
    I hope it's now off at the emergency switch and you have help coming to find out what's wrong.

    Those switches aren't called "safety switches" out of whimsy.
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
    mattmia2Waher
  • Jpat123
    Jpat123 Member Posts: 7
    I ordered 2 of these so I could replace them 
    My boiler been running  hitting temp and turning off and on 
    So far so good    thanks for the help guys
    I'll let everyone know  how i make out
    mattmia2
  • Steamhead
    Steamhead Member Posts: 16,821
    That's the "roll-out" safety. If this thing is going bad, there is something else VERY wrong. You need to shut it down and call a pro NOW. Where are you located- we might know someone........
    All Steamed Up, Inc.
    Towson, MD, USA
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service
    Consulting
    mattmia2Waher