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BBHW Boiler won't stop running

TomO Member Posts: 7
pump is running and the temp is right around 180 degrees. ran ok most of the day but my wife says it happened again today in the late afternoon.

Thanks for the feedback, I'll try replacing the relay. Tom.


  • TomO
    TomO Member Posts: 7
    Its hot in here

    It was warm in NJ today but I came home tonight to a 78 degree house. I have a two loop system (1st, 2nd floors). The second floor was cool but the 1st floor radiators were hot. The thermostat is set to 64 and it wasnt calling for heat but the boiler was running. I turned the thermostat off and it still kept going. I turned the power off waited a couple hours and checked the thermostat for loose wires but as soon as I turned it back on it started up again. Any ideas? Thanks.
  • kpc_45
    kpc_45 Member Posts: 29
    you have

    a short somewhere in the t-stat.
  • TomO
    TomO Member Posts: 7
    could it be the valve sticking?

    I'm a novice HO and new to hot water. I tried a few things with the t-stat with no luck. I tightened the wires at the boiler (from the t-stat) but also played with the valve. I don't know the manufacturer (its a green box Type 13S16 102 made in Italy) but it has a slide on the top that goes from manual to auto. I slid it to manual then back. I turned the system back on and now it appears to be running fine. Any advice is appreciated.
  • Mark Eatherton
    Mark Eatherton Member Posts: 5,853
    Stuck relay...

    After a few years, relays become magnetized and will not release when asked to. May not happen again. If it does, need to replace.

    Was the boiler running at around the normal max temp (180 degrees F)? And was the pump running?


    It's not so much a case of "You got what you paid for", as it is a matter of "You DIDN'T get what you DIDN'T pay for, and you're NOT going to get what you thought you were in the way of comfort". Borrowed from Heatboy.
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