Morne asked ... My defy dtl 125 toploader?    |    Ernie asked ... How to fix gearchange ldv maxus van 2006?    |    Cuckoo asked ... Changing batteries on a fixed bt corded phone?    |    Marc Nollid asked ... Nissan Micra mk 5 2018 rear seat mecanism?    |    Maggie asked ... New Home 535?    |    Click here to ask your question

potterton prima makes loud banging after 3 mins of operation?

as above
james kelly, November 2009
Probably a faulty pump making the boiler overheat - it should then trip out.
Or running on heating only, all thermostatic valves shut down
Or corroded flue will make it 'hunt'
Or scaled up heat exchanger
But most likely 1

Mattyb, November 2009
link Click here to see other fixes for Potterton Prima.