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water in boiler not circulsting put in new pump?

water not circulating stays in heat exchanger
rich, February 2007
ANYONE GOT A PARROT ON HERE.

VD, February 2007
more than likely an air lock in pump,, but did you remember to open the isolation valves too flow and return.........

clfgas, February 2007
you must have airlock in pump

hi-spec plumbing, February 2007