We may have found other answers which could help you.
Click here for Boiler Ignition ThermocouplePotterton Prima 60F- can you start it manually?
E133?
My potterton boiler keeps losing water pressure and condens?
How to replace Potterton EP 3002 with EP 2?
Pressure gauge on a Potterton Boiler?
potterton 16/22 pilot lihght out?