The hot water recirculation motor drones on for long periods , before and after the boiler fires up.
This electric powered water recirculation motor is mounted on the top right corner a few inches above the boiler. It is wired to the main power off-on switch as is the Beckett oil blower.
I can't figure out why this motor runs sometimes for hours , then shuts off, to do it again later. I don't know what controls this motor.
Is this normal? or What can I check?
This boiler heats my house hot water and floor board radiators for house heat. (house thermostats currently off for the summer)