If your Worcester Bosch boiler is displaying the EA227 code, it’s a sign that something has stopped the boiler from starting up properly. This kind of error can disrupt your home heating and hot water—especially frustrating when you most rely on your boiler. Here, you’ll find a practical breakdown of what the EA227 error means, why it happens, and what you should—and shouldn’t—do next.
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What Does the EA227 Error Mean?
The EA227 code signals that your boiler’s ignition sequence has failed. In other words, when the unit tries to light the gas and produce a flame, it hasn’t been successful—usually after several attempts. As a result, the boiler locks itself out as a safety precaution to prevent the risk of unburnt gas or further faults.
Unlike fault codes that appear after the burner is running (such as those for an extinguished flame), this specific error happens because the flame never properly establishes in the first place.
Main Reasons for the EA227 Error
A failed ignition can come down to a few core issues. Homeowners may be able to check some of these themselves, while others call for professional expertise. These are the most common causes:
Gas Supply Issues
A restricted or interrupted gas supply is a leading reason for ignition failure. This can stem from a closed emergency shut-off valve at the property, network outages, meter credit running out, or supply interruptions in your area.
Problems with the Ignition Components
The ignition system is made up of small but important parts, including the ignition electrode (responsible for sparking) and the flame sensor (which detects that a flame has lit). Wear, damage, or dirt on either can stop a successful ignition or make the boiler think it hasn’t managed to light at all.
Burner or Jet Blockages
Fuel can’t reach the burner if jets are clogged with debris or carbon buildup. Even a minor obstruction can result in insufficient gas, so the boiler can’t ignite.
Malfunctioning Gas Valve
A faulty, jammed, or electronically misbehaving gas valve can prevent gas from reaching the burner when needed. This is a fault only a Gas Safe engineer should investigate.
Blocked or Frozen Condensate Pipe
A less frequent cause, but a fully blocked or frozen condensate pipe may stop the boiler from beginning the ignition process, since built-in sensors won’t allow operation if drainage is impaired.
Steps to Take Before Calling for Help
Not every EA227 code needs a professional straight away. Here’s what to do if you spot the error:
1. Confirm the Gas Supply
- Other Appliance Check: See if other gas appliances in your home (like a hob or fire) work. If they don’t, your gas may be off more widely. Contact your supplier if needed.
- Meter and Valve: Make sure any prepayment meters are in credit. Locate the emergency gas shut-off valve near your meter and ensure it’s open (handle lined up with the pipe).
- Neighbourhood Issues: Speak to neighbours to check if the outage is area-wide.
2. Attempt a Boiler Reset
Many modern boilers have a reset button on the front panel. After verifying the gas supply is fine, try resetting the boiler once or twice. Repeated resets serve no benefit and are not recommended if the problem persists.
3. Inspect the Condensate Pipe (in Cold Weather)
If temperatures have dropped, see if the small plastic condensate pipe running outside is frozen—icy or slushy sections are a sign. Pour warm (not boiling) water carefully along the pipe to melt any blockages, then attempt a reset.
When It’s Time to Bring in a Gas Safe Engineer
Some faults are not suitable for DIY repairs and must be addressed by a fully qualified engineer. Book an expert call-out if:
- The EA227 code stays after you’ve checked your gas supply and reset the boiler
- All visible pipes are clear but ignition still fails
- You suspect a problem with key components inside the boiler, such as the gas valve, electrodes, or burner assembly
Never attempt to open or service any internal gas-related parts yourself. Gas Safe registration is a legal requirement for boiler repairs involving these components.
Professional engineers have diagnostic equipment to trace faults, check or replace electrodes, inspect and test the gas valve, and ensure everything is operating to specification. This helps restore safe, reliable heating while maintaining compliance with manufacturer warranty terms and UK regulations.
With years of experience in boilers and home improvements in general, Myles Robinson is a passionate advocate for making home heating simpler, safer, and more affordable for households across the UK. With years of experience in the heating industry, Myles combines hands-on knowledge with a focus on customer-first service, helping homeowners choose the right boiler, understand their systems, and keep their heating running efficiently all year round. His articles break down complex topics into clear, practical advice you can trust.