I have a 30 year old Glow Worm economy plus boiler which has been fairly reliable over this period. It is just on morning and late afternoon at the moment for hot water only. A couple of days ago the metal casing has started to vibrate when boiler fires up. If I put my hand on the front of the casing the noise stops only to restart when I let go. It has never done this before in the 30 yrs we have had it. It has been serviced every year. What could be causing this vibration?
Last edited:

