i've recently moved into a new house, and the central heating system is
extremely noisy. There is a large vibration around the pump, which echo
throughout the pipe work making the whole system extremely noisy -
especially when it comes on at 5:30am!
The vibration exists on all 3 pump speeds, and it gets worse if i increase
the water temperature in the boiler.
What would be causing this? It is a bad pump?? Any advice??
Pump bearing probably gone. They have a limited lifetime.
Normally they are easy to replace as there should be isolating valves either
side of it.
You may have to purchase/borrow a pump spanner along with the new pump.
Go for the beefiest pump you can afford, it will be worth it.
i.e. if yours is 5m head get a 6m one. It will be quieter for one thing.