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Triangle Tube Boiler Prestige

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Recently and in the past when we use hot water the boiler will call for DHW and fill tank, but also runs the spacing heating for the whole house. I have only one zone. This happened last year and I was able to stop it by removing the thermostat wires from the unit. This year tho- that doesn't correct the problem. The house heats up and believe me it is not good. I have to check the Control module fuses yet and will do that tomorrow, but other than that I have to turn the power off to the unit until I need hot water.
I also think this happens when around the same time each year and the weather is cooling off at night. I think this is some sensor that is used outside to run an algorithm to be more efficient.

Has anyone ran into this problem or have a direction that I can go to repair?

Thanks in advance

Comments

  • kcopp
    kcopp Member Posts: 4,452
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    You are getting ghost flow through the piping.
    This is most likely due to a flow check getting stuck in the open position....or bad piping.
    A temporary fix is to close on of the ball valves to the heat loop.
    Do you have any pix of the install?
    Zman
  • unclejohn
    unclejohn Member Posts: 1,833
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    May be the 3 way valve has some dirt in it. Try manually opening and closing the valve. Those units pretty much must have a dirt separator, a magnetic one at that.
  • psb75
    psb75 Member Posts: 863
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    It's contrary to what you are thinking. The outdoor sensor should actually keep your heating system shut down. It puts the heating system in a state called "warm weather shut down"--if it is installed and installed correctly.