Help & fault codes
Boiler fault codes and common problems
Plain-English guides to the faults we repair most often, with the safe checks you can do yourself before calling an engineer.
Phones answered 7am–8pm, 7 days a week. Gas Safe registered 943380.
Further work and parts are always priced and agreed before we carry on.
Gas Safe registered 943380Worcester Bosch EA 227
EA 227 means the boiler tried to light but did not detect a flame, so it locked out for safety. It is one of the most…
Read the guide →Ideal F2 / L2
On Ideal boilers such as the Logic and Vogue, F2 means the flame was lost and L2 means the boiler failed to light and…
Read the guide →Vaillant F28 / F29
On Vaillant ecoTEC boilers, F28 means the boiler failed to light on start-up and F29 means the flame went out while it…
Read the guide →Baxi E133 / E119
E133 on a Baxi boiler means it could not light, often because gas is not reaching it. E119 means the water pressure is…
Read the guide →Boiler losing pressure
Most combi and system boilers need about 1 to 1.5 bar when the heating is cold. If the pressure drops below about 1…
Read the guide →Combi boiler
If your heating works but the taps run cold, or the hot water keeps going hot and cold, the fault is usually in the…
Read the guide →Code not listed? Call us on 023 9343 0030 with your boiler make and the code shown, and we will tell you what it means.