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    AidanS's Avatar
    AidanS Posts: 2, Reputation: 1
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    #1

    Oct 15, 2012, 07:46 PM
    Burnham boiler will not shut down after temp has been reached
    I have a 1987 Burnham ANS-Z21-13 gas, forced steam boiler that will not shut down when the set temperature has beeen reached, and will run all night. I disconnected the thermostat and the furnace continued to run, so it doesn't seem like the thermostat. It does have 2 pressuretrol controllers (1 was replaced by a tech last year). Could it be a bad pressuretrol controller or a stuck relay somewhere?
    Grady White's Avatar
    Grady White Posts: 1,417, Reputation: 59
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    #2

    Oct 17, 2012, 07:26 PM
    It could be either. Look at the setting on the pressurtrol with the higher set point & also at your pressure gauge. Is the boiler pressure higher than the setting?
    AidanS's Avatar
    AidanS Posts: 2, Reputation: 1
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    #3

    Oct 18, 2012, 02:59 PM
    Yes. Pressuretrol is at 0.5 PSI and the pressure gauge is at 3 PSI. For the past few years that I've owned the house, the Pressuretrol has always been at the lowest setting of 0.5, but the pressure gauge usually sat at about 0 or maybe 1 PSI.
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