why does my boiler rumble?

Question

my boiler vibrates and rumbles when central heating on

Answer 1

Try turning the thermostat down, number 3 is about right this time of year, if this noise is new, could be scale, pump slowing down due to wear, sludge in the system or sticking diverter valve.

Answer 2

If your boiler has a circulating pump that might be a problem, but generally the water in a boiler will roil when boiling. If you have a steam boiler, a little oil in the water can make it jump pretty good.

Answer 3

the noise is called kettling, your boiler probably has a small amount of debris in the heat exchanger from corrosion in the system, if it is not to bad a simple flush out of the water and add fernox boiler silencer will do the trick but if its bad a powerflush and new heat exchanger may be needed

Answer 4

It's the water contracting and expanding through the process of getting cool and then being heated. It happens to all boiler systems. Sometimes air trapped inside can make a hell of a racket. Systems should be bled once a year.

Answer 5

In a previous question I answered that my belly has been like your boiler all day, and I work in a library (yes it is supposed to be sort of quiet) and the thought of farting in front of all those people made it worse - glad to get home. Why don't you ask a plumber friend (got to be a mate as they make more money than brain surgeons) whats up. Anyway good luck - hope someone helps you. It must be so annoying, and a bit worrying too. Luv Camilla

Answer 6

Make sure your circulator pump is working,and check water pressure Gauge @12-15 PSI.

Answer 7

You have a box containing flames, pipes full of moving water and probably a pump... Go figure :-)

Answer 8

you could have an air block ask your plumber to sort it out