Why is my Worcester Bosch boiler making a funny noise?

[sydneydydney]

After a bout of bad weather, our WB boiler has suddenly started making a horrible noise and the water pressure keeps going up. We are trying to get someone to come and look at it. In the meantime, anyone got any ideas what's causing (not sure if it's safe to use!)

Thanks!

[Buenchico]

I know next to nothing about plumbing and heating but I do understand a bit of physics.

The only thing I can think of, which would increase the the pressure of your hot water, is steam within the tank. This could only be present if the water is boiling. This suggests that the thermostat has failed, resulting in the water constantly being heated.

As I've stated, I'm not an expert, but I think that the continuing build-up of pressure inside the boiler could lead to a serious risk of explosion. (The horrible noise you're hearing could be related to the boiler vibrating as it's put under stress by the build-up of stream). Please turn it off!

Chris

[sydneydydney]

Hello Chris,

Thank you very much! I turned it off and we had a shivery (but safe!) evening and the engineer is downstairs fixing it now. I'm very grateful for your advice.

[jjcaa1995]

your boiler will have a flexible hose which runs from a mains pipe to the boiler with 1or 2 valves on, one or both will be slightly open letting a small amount of water into the system they must be turned off

[sydneydydney]

Hello Everyone,

Thanks for your advice. Just to let you know that the gas man has now been (three times!). The boiler had a broken fan, the circuit board had blown and the thermostat is broken (thank you Chris!).

Best regards, sd