Common Boiler Error Codes Explained – A Heating Engineer’s Guide

When your boiler shows an error code, it can be worrying — especially during a chilly Leeds winter. As experienced heating engineer based right here in Leeds, we often get called out to fix issues that start with a simple flashing code. Understanding these error messages can help you know when it’s a quick fix, and when it’s time to call in the pros.

Here’s a breakdown of some common boiler error codes we encounter across Leeds homes, and what they usually mean:

Worcester Bosch Boiler Error Codes

EA Error – Your boiler isn’t detecting a flame. This usually points to a gas supply issue, ignition problem, or a fault with the flame sensor.

C6 215 – The fan is running too slowly. This could be a fan fault or a blockage in the flue system.

A1 Error – Low water pressure. Topping up the boiler’s pressure might fix this, but if it keeps happening, there may be a leak somewhere.

Ideal Boiler Error Codes

L2 Fault – Ignition lockout. The boiler tried to light but failed. Common causes include gas pressure problems or ignition lead issues.

F1 Error – Low water pressure. Again, this can sometimes be sorted by repressurising the system yourself.

F2 Error – Flame loss. This can happen for several reasons, including a blocked flue or faulty electrodes.

Baxi Boiler Error Codes

E119 Error – Low water pressure. If the pressure gauge is below 1 bar, you’ll need to repressurise the system.

E133 Error – Ignition fault or gas supply issue. If your gas supply is okay, it could be a problem with ignition leads or the flame sensor.

E168 Error – General fault. This is a tricky one — it can be anything from an electrical fault to an issue with internal components, so it’s best to call an engineer.

Should You Reset Your Boiler?

Sometimes, a simple reset can clear a minor fault. But if the error code keeps returning, don’t ignore it. Persistent problems can cause bigger issues and leave you without heating or hot water just when you need it most.

If in doubt, it’s always safest to get professional advice. Many issues — especially anything gas-related — must legally be handled by a Gas Safe registered engineer.

Need Help with a Boiler Error in Leeds or Surrounding Areas?

If you’re seeing an error code on your boiler and aren’t sure what to do, get in touch. As a local heating engineer based in Leeds, we offer reliable, friendly callouts to help you get your home warm again — safely and reliably.