Boiler diverter valve and nocking noise

[vinux]

Hi,

How likely is it that a faulty boiler diverter valve causes the pump to make knocking noise?

My radiators become hot even when the central heating is off so one plumber quoted £85 for the diverter valve + £250 labour. Is it reasonable?

I have got Sime Friendly Format E.

Thanks for your help.

 

[bengasman]

Sounds a bit steep, but must admit that the simes I have worked on where such a nightmare that I would quote over the odds as I would expect to have problems.

 

[vinux]

Thanks for quick response, bengasman.

Do you think that a faulty diverter valve could cause the pump to make knocking noise? It feels like the pump isn't getting enough water for central heating and is pushing air instead.

 

[bengasman]

Have not heard a lot of knocking pumps, but I suppose it is possible.

 

[scatmanjohn]

£335

Get BG to do it for Approx £180.

 

[johnfox]

london prices and london problems.