Posted by mike on November 06, 2001 at 11:48:52:
In Reply to: It's Too Hot! posted by Nathar on November 05, 2001 at 17:57:03:
: We've got a Weil-McClane gas fired steam boiler that's about 13 years old. We've also got a Honeywell Programmable Thermostat. When the room heats up past the set temperature, the boiler keeps heating up. If I look at the burners, they are still firing and not really cycling down. I don't know if this could be a problem with the thermostat, because when I shut off the thermostat the boiler does shutoff. Do the burners need to be adjusted? Is it a problem of short cycling?
To me it sounds like the thermostat is wired wrong.If it is a heating and cooling Tstat it could be wired wrong,,Remove Tstat and see if what terminals the wire gos to,,,,it should be R and W.,,if thats ok,and boiler is still running with Tstat off the subbase,,then look for a shorted wire,,good luck,mike