Posted by David on December 21, 2000 at 05:25:34:
We just bought a home that was built in 1973. We fired up the boiler but have noticed the pump being tempermental. Sometimes it circulates after it "clicks" on and sometimes it just sits there and hums after the "click". When it is running it is silent and seems to be efficient. If it is humming I have to go to the thermostat and shut it off and then back on to start the pump again. Any thoughts on what this means??
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