Noisy diverter valve problem.

[wavydavyboy]

I have a Baxi Maxflow Combi WM. The diverter valve was replaced 1 year ago because the rads were on permanently when the system was trying to heat the hot water. About 2 months ago the boiler started making a brief hammering sound when the heating came on - the engineer stripped down the diverter valve, the sound stopped for 1 or 2 days, then started again. He couldn't explain why it was making the noise. It's now getting a bit more noticeable.
Questions:
Why does the valve make the hammering sound?
The valve is a Honeywell V4044C1783 - is this correct for this boiler?
Is the only answer a new valve?

Any help greatly appreciated - thanks.

 

[philli woods]

I have a Baxi Maxflow Combi WM. The diverter valve was replaced 1 year ago because the rads were on permanently when the system was trying to heat the hot water. About 2 months ago the boiler started making a brief hammering sound when the heating came on - the engineer stripped down the diverter valve, the sound stopped for 1 or 2 days, then started again. He couldn't explain why it was making the noise. It's now getting a bit more noticeable.
Questions:
Why does the valve make the hammering sound?
The valve is a Honeywell V4044C1783 - is this correct for this boiler?
Is the only answer a new valve?

Any help greatly appreciated - thanks.

is this not the gas valve you refering to

 

[Softus]

is this not the gas valve you refering to

WTF?

 

[philli woods]

is this not the gas valve you refering to

WTF?

soz retractable head,left hand side, long day not much sleep

 

[Softus]

Fair play

 

[wavydavyboy]

Erm... not sure what the gas valve is, or if it's relevant!
Any ideas anyone?

 

[Softus]

Erm... not sure what the gas valve is, or if it's relevant!

It's an electrically operated valve that allows the gas supply to reach the burners and, where fitted, the pilot. It is not relevant to the problem you described at the start of this topic.