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burnham scg gas boiler control problem

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paul_92
paul_92 Member Posts: 8
in THE MAIN WALL
check if you have 24 v at the y terminal on that control when you have the t-stat disconnected .. you shouldnt have voltage there when theres no call for heat

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  • Chris_61
    Chris_61 Member Posts: 7
    control problem with burnham scg gas boiler

    I started a burnham scg gas boiler today and it runs continuously without any call for heat, tt disconnected and it only shuts down by the hi limit control.

    I replaced the combo transformer/relay, honeywell R8285D, still the same problem. The blower relay pulls in as soon as the boiler is energized and the boiler fires up. It seems that there may be a problem with the factory control wiring. Any suggestions.

    CG

  • paul_92
    paul_92 Member Posts: 8
    t stat

    so you replaced the fan center..make sure with your meter that the t-stat isnt calling between terminals r and g ... the problem has to be at that point ..unless there are some serious wiring issues and you need to get a pro
  • Chris_61
    Chris_61 Member Posts: 7


    The t-stat wires are disconnected from the relay and it still cycles.
  • paul_92
    paul_92 Member Posts: 8
    ????

    when you replaced that control did you replace the relay that was in it too??
  • Chris_61
    Chris_61 Member Posts: 7


    I put the original control back in and I have the same problem. The customer has heat for the weekend and I'll be back there Monday to check the voltage at the y terminal. thanks for the input.
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