noisy vibration in heating system

hi
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??
thanks martin
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See my post a bit further down about ticking pipes - if yours is an old system it is probably sludged up with poor flow. Mark On Mon, 8 Dec 2003 09:21:52 -0000, "news.uk.tiscali.com"

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