potterton performa 28

[priceyson]

hi problem with h/w open the tap boiler fires about 10seconds then boiler makes loud banging pressure needle bounces around and boiler cuts off not goin to lockout ?? pump??cheers

 

[namsag]

if its doing same on heating then yes pump

 

[priceyson]

ok cheers what if it isnt ??(not my boiler not sure if it is)

 

[powell30]

If it only happens on hot water i think it is a diverter issue not pump.....do the 2 pins one at back left and one at front both move and make contact before firing?

If so i am sure its the DV

 

[shawd]

plate heat exchanger blocked,, clean or replace , better to replace,, if the problem is only happening on hot water , hope that helps

 

[priceyson]

replaced pump , problem solved cheers for ur comments

 

[Beerlover]

This one took nearly a year to finish

I hope you don't charge by the hour.