While you wait for answers, we may have found some information which could help you.
Click here for Heating Home Heating Systems
Vaillant ecotec 831 plus?
Remove cover off gas boiler?
Worcester 30 Cadillac combi boiler won’t fire up and the EA?
Oil fired boiler thermostat?
How to fix my fireplace?
Greenstar 24Ri boiler, fast flashing - can I reset?