We may have found other answers which could help you.
Click here for Pilot Light RestartPressure gauge on a Potterton Boiler?
My potterton boiler keeps losing water pressure and condens?
E133?
How to replace Potterton EP 3002 with EP 2?
Potterton Perfoma 24. Hot water works fine No heating?
Potterton Prima 30F?