We may have found other answers which could help you.
Click here for Boiler Coming GoingPotterton Perfoma 24. Hot water works fine No heating?
Potterton EP2000 - pump control?
My potterton boiler keeps losing water pressure and condens?
How to replace Potterton EP 3002 with EP 2?
Replace potterton mini minder Es?
Potterton heatmax combi?