Pump vibration

[timbalcombe]

Hi

I have a vaillant eco tec pro which is about 2 years old now.
There is quite a faint rumbling sound to be heard through the pipes.
Also one of my rads upstairs is vibrating to the same frequency of the rumbling. (the rumbling is amplified in stud walls etc where pipe work runs)
All valves fully open & no air can be bled from any rads.
Any help apreciated.
Cheers

 

[superdupergasman]

Either Pump or fan??? Get a screwdriver on the pump and listen, if constant then would say pump as fan only runs intermittantly.

 

[timbalcombe]

It continues after the burner has gone out and the pump is circulating.
i would say this is possibly the pump, or a blockage somewhere, but all rads heat up ok?
What causes a rad to vibrate?
The boiler makes a huge vibration on initial ignition for 5 secs, but I think this is a seperate issue, and digress.

Vaillant came ou a year ago, as I wasn't happy with the flow monitor thing that regulates gas/demand. It made a rattling noise, but only on a certain feed eg the bath hot tap.
They looked at gas rates then, and I think they changed the mix.
Is it worth getting BG to attend using homecare and mention it on anual inspection?