Crickets in the system

[Jameswren]

My heating system is making a rattling noise a bit like a family of crickets has moved in.

I can here it very clearly around the pump and the noise got faster when I changed the pump setting up. The noise is also obvious if I put my ear near the pipework.

Any ideas in cause / how to get rid?

 

[Jameswren]

When I switch the pump off the noise goes - is a new pump needed or some other way to fix the issue?

 

[Agile]

Sounds like a lack of water!

Pressure?

Water in F&E tank?

Tony

 

[Jameswren]

Pressure is just over 1 bar.

F&E tank will be in the loft won't it? Can't get there at the moment.

The hot water and rads are very hot and flow quickly.

 

[Agile]

If you have pressure then there is no F&E tank.

What is the angle of the pump shaft?

What happens when you remove pump screw?

Tony

 

[Jameswren]

You've gone past my tiny plumbing knowledge now!

What's the pump shaft? What screw?

 

[oilhead]

Most probably the pump shaft bearings, especially if the noise increases with pump speed increase. Could be a foreign body in the base of the pump, but if it is a few years old, then wear & tear is favourite.