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Had this exact issue after a pump swap in my old place. Vibration kicked in the next day.
Turned out the new pump was running full blast while most of my radiator valves were barely open. The water had nowhere to go.
Your UPM3 has a button right on the front to change modes. If it sits on constant speed III, drop it down to II. See if the hum quiets down. Takes two minutes to test.
Keep bugging your plumber, too. He put it in, so he owns the noise. Send a text or email so you have proof in writing.
Turned out the new pump was running full blast while most of my radiator valves were barely open. The water had nowhere to go.
Your UPM3 has a button right on the front to change modes. If it sits on constant speed III, drop it down to II. See if the hum quiets down. Takes two minutes to test.
Keep bugging your plumber, too. He put it in, so he owns the noise. Send a text or email so you have proof in writing.
