whell i think it's one zone.
i can't shut any one room down unless i turn off the valves on the radiators.
here's what i found.
the pressure is down about 7 psi.
i found the piramid shaped valve to let water in.
i opened it bout ten/15 seconds, no psi change, ran upstairs three rads are filled w/ airlike never before ppppsshhhhhhh!!!!!!!!!!!!!. top floor two got nuthin, no air no water no nuthing.
do i let the water in the valve with the very top floor radiator bleeder open?
while i'm in the basement?
there is another bleeder near the burner, but litle air comes out.
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