E
Ermintrude
Stick boiler on the e setting and that's it. If it's open vent check all your pipe work is lagged and your headder well insulated.
Is the pump wired directly to the boiler? If not ask your installer to come and correct this as it will immediately invalidate your warranty. Take it you don't have an Eco pump? I would look at a filter, smart start stat and check your cylinder stat isn't set above 70c .
Is the pump wired directly to the boiler? If not ask your installer to come and correct this as it will immediately invalidate your warranty. Take it you don't have an Eco pump? I would look at a filter, smart start stat and check your cylinder stat isn't set above 70c .