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RBM RBM is offline
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Default furnace keeps going on even tho thermostat temp reached

Yes, that would be a maintained temperature boiler as opposed to a cold
start boiler, usually found on boilers that have a coil for domestic hot
water. An aquastat in the water jacket controls the temperature, connected
to a triple aquastat relay. Of course these days with hi end digital
controls, that stuff will soon be a thing of the past


"EXT" wrote in message
anews.com...
In some systems the boiler runs without the thermostat. It has its own
internal thermostat that controls the temperature of the water in the
boiler always keeping it hot when the boiler is turned on. The wall
thermostat will turn on a pump sending hot water to the radiators when
needed and turning the pump off when not needed. But the boiler always
keeps itself hot. Other systems work differently.

"RBM" rbm2(remove wrote in message
...
If the thermostat is for heat only, not A/C, once you open it up you will
see two wires attached to screws. Remove one of them and the heat for
that zone should stop if the problem is a bad thermostat. This circuit
works on 24 volts so it's not dangerous. Beyond a bad thermostat, you
should call a heating professional


wrote in message
ups.com...
it's oil heat, baseboard. i'm a complete newbie - how do i disconnect
the thermostat?????