On 15 Jan 2012 18:00:39 GMT, BM BM2home.com wrote:

the system is only one year old. everything was replaced. i now how to
turn the system back on when its locked out.

when i pull the fuse to the electric box for the circulator motors i can
hear them turn on, so something is going on inside ther. maybe it just
takes several hours for the water to circulate enough to start heating the
house, but that dosent seem normal.

It is not normal. I'm not sure what fuse you are pulling though. When
you pull a fuse, things stop.

You have to understand the system to diagnose though. The thermostat
does not turn on the burner. It turns on the circulator. The water
starts to circulate and when the temperature in the heater cools down,
an aquastat starts the burner. When it reaches the desired
temperature, the burner stops, but water keeps on circulating.

When the thermostat reaches the desired temperature, it turns off the
circulator. The burner may or may not be running. It will run long
enough to bring the water up to the "reserve" temperature.

What I don't understand is why you have a system that has integrated
hot water unless this is a stand alone tank with a heat exchanger. The
old systems are extremely inefficient and costly to operate.

OTOH, some newer energy efficient models work a bit differently. Mine
won't allow the circulators to run until the water is up to
temperature. There are electronics controlling all the stuff though
and I think you stated you had none.

Nothing to do with running out of fuel, but be sure you have
sufficient water in the system. Pumps can run but with nothing to
circulate, no heat. Also, how long were you without oil? Could a pipe
in the wall have frozen over the past day or so? That would cause a
block to prevent heat from circulating.