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Steam Boiler - Not firing up

dbeswe01
dbeswe01 Member Posts: 3
in Strictly Steam
I have been having some trouble with I thought the thermostat, replaced today hoping it would resolve the problem of the boiler not firing.  The pilot is lit, water supply & power supply are good.  I can hear it click when adjusting the thermostat in attempt to get the boiler to fire but it does not.  Suggestions on what else can be checked? 

Comments

  • JStar
    JStar Member Posts: 2,752
    RE

    Avoid changing out parts without knowing why. You'll save a lot of money. Could be a number of different things going on. What clicks? The thermostat or the boiler?
  • Dave in QCA
    Dave in QCA Member Posts: 1,788
    possibilities...

    You should check the thermocouple first.  This is usually the first and most likely item to fail.  Thermostats are much less likely.  There are a string of other things in series in the circuit too, such as one or two low water cut offs, a high pressure cut out, and of course the gas valve.

    If you don't have the basic knowledge on how to individually testing these items, you would be money ahead to call a pro.
    Dave in Quad Cities, America
    Weil-McLain 680 with Riello 2-stage burner, December 2012. Firing rate=375MBH Low, 690MBH Hi.
    System = Early Dunham 2-pipe Vacuo-Vapor (inlet and outlet both at bottom of radiators) Traps are Dunham #2 rebuilt w. Barnes-Jones Cage Units, Dunham-Bush 1E, Mepco 1E, and Armstrong TS-2. All valves haveTunstall orifices sized at 8 oz.
    Current connected load EDR= 1,259 sq ft, Original system EDR = 2,100 sq ft Vaporstat, 13 oz cutout, 4 oz cutin - Temp. control Tekmar 279.
    http://grandviewdavenport.com
  • TomM
    TomM Posts: 233
    step one

    get a copy of the wiring diagram first.  never travel in uncharted waters without a map.

    There was an error rendering this rich post.

  • STEAM DOCTOR
    STEAM DOCTOR Member Posts: 2,212
    edited September 2011
    overflow switch

    Try pushing the reset button on the overflow switch(that's the thingy on the flue pipe opening). If the boiler fires TURN IT OFF ASAP and call a chimney expert.
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