Got fault code 227 flashing on your Worcester Bosch boiler? It’s a common fault that can often be sorted out without too much hassle.
This guide explains what the 227 error means, what’s likely causing it, and what you can do about it.
We’ll also cover when to step back and call a Gas Safe engineer.
Safety first - but we’ll help you get your boiler running again.
Let’s dive in…
Key Takeaways:
Fault code 227 means your boiler has failed to ignite and has gone into ignition lockout.
Common causes include gas supply issues, blocked condensate pipes, or faulty ignition components.
Try a boiler reset first, but don’t attempt DIY repairs involving gas or electrics.
An engineer may need to check the ignition electrode, gas valve, or PCB.
If the boiler keeps locking out, it may be time to replace it.
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What Does Worcester Boiler Fault Code 227 Mean?
Fault code 227 means your Worcester Bosch boiler has failed to ignite.
In plain terms, it tried to light the burner but couldn’t, so it shut down as a safety precaution. This prevents unsafe operation and wasted gas.
According to Worcester Bosch manuals, fault 227 specifically indicates that the boiler couldn’t detect a flame after several ignition attempts.
“Fault 227 usually boils down to ignition failure. A reset can sometimes clear it, but if your boiler keeps cutting out, it’s worth having a Gas Safe engineer take a look - or even consider a replacement if it’s an older model.” - Patrick Garner, Gas Safe Engineer
Possible Causes of Fault Code 227
Several issues could be preventing your boiler from igniting:
Low or no gas pressure - If the gas supply is weak or disrupted, ignition will fail. This could stem from a meter fault, low mains pressure, or even an issue with your gas provider.
Blocked or frozen condensate pipe - In cold weather, this pipe can freeze or clog, stopping the boiler from firing up safely.
Faulty ignition electrode or flame sensor – If these components are worn, dirty, or misaligned, the boiler can’t spark or detect a flame.
Gas valve malfunction - A stuck or faulty gas valve may block the gas flow, preventing ignition.
PCB (Printed Circuit Board) fault - If the boiler’s control board is failing, it might not send or interpret signals correctly, leading to a lockout.
Can I Fix It Myself?
Tempted to have a go? Fair enough - but stay within safe limits.
Here’s what you can do:
Try a reset – Most Worcester Bosch boilers have a reset button or digital option (check your manual). Hold the button for a few seconds or follow the on-screen prompt. If the fault was a one-off, this might clear it.
Check the condensate pipe – If it’s freezing outside, the pipe might be iced over. A quick thaw with warm (not boiling) water could solve the issue. Here’s how to do it safely.
That’s your lot.
Anything beyond this - like opening the casing, touching gas components, or fiddling with wiring - is a job for a Gas Safe registered engineer.
UK law says so, and for good reason: gas safety isn’t something to mess with.
When to Call a Gas Safe Engineer
If a reset doesn’t solve the problem - or the fault keeps coming back - it’s time to bring in a professional.
A Gas Safe registered engineer can safely diagnose and fix issues such as:
Checking or replacing ignition electrodes and flame sensors
Inspecting the gas valve for faults or blockages
Testing the PCB and replacing it if necessary
Measuring gas pressure and resolving supply problems
You can find a qualified engineer through the Gas Safe Register.
Repeated lockouts are a warning sign - they usually mean something deeper needs attention. Don’t ignore it.
How Much Does It Cost to Fix Worcester Bosch Fault Code 227?
Repairing fault code 227 typically costs between £150 and £400, depending on what’s causing the ignition failure.
Costs vary based on the complexity of the repair, the parts needed, and how quickly you need the fix.
What Affects the Cost?
Type of fault - Minor issues like a frozen condensate pipe may be resolved for under £150. But if it’s a faulty PCB, ignition electrode, or gas valve, expect to pay more for parts and labour.
Location - Engineers in London or other major cities may charge more than those in smaller towns or rural areas.
Call-out timing - Need it fixed urgently or out of hours? Be prepared for a higher rate.
Tackling the issue early can prevent further damage and keep your heating system running safely and efficiently.
If repairs are starting to stack up, it might be worth comparing costs with a full boiler replacement.
Should You Repair or Replace the Boiler?
If your boiler is over 10 years old and frequently displays fault code 227 or related issues, it could be nearing the end of its lifespan.
Repairing components like the PCB or gas valve can be costly, often running into hundreds of pounds.
When problems start adding up, a new boiler might be the smarter, more economical option in the long term.
Explore Heatable’s fixed-price boiler replacement quotes for a modern unit backed by a solid warranty up to 12 years available on selected models - start here.
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The best way to resolve the F28 error code is to seek the help of a registered Gas Safe Engineer, who will be able to diagnose and repair whatever is causing the f28 code to be displayed.
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