Worcester Bosch EA 227 Fault
What the EA 227 code on a Worcester Bosch Greenstar means — no flame detected — the common causes, what you can safely check, and when to call a Gas Safe engineer. Call 07927 882561.
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Upfront cost — no obligation EA 227 is the most common fault code on Worcester Bosch Greenstar boilers. It means the boiler has failed to detect a flame — it tried to fire but no burner flame was sensed, so it locked out to keep you safe. Sometimes the cause is simple and something you can sort yourself; other times it needs a Gas Safe engineer. Gas First are Gas Safe registered (587401) Worcester engineers across East London — here’s what EA 227 means and what to do about it.
What the EA 227 code actually means
EA 227 is a “no flame detected” lockout. The boiler goes through its ignition sequence but the flame either fails to light or isn’t sensed, so the boiler shuts down as a safety measure rather than keep trying. It is a lockout, not something to force through by holding the reset — if the flame genuinely isn’t there, resetting repeatedly just repeats the same failed ignition. The code points at the gas, ignition or flame-sensing side of the boiler. For the full list of codes across brands, see our boiler fault codes guide.
Common causes of EA 227
In cold weather, EA 227 is very often a frozen condensate pipe — the external pipe freezes and backs up, stopping the boiler firing. Outside of that, the usual causes are a gas-supply problem (a gas meter that’s been turned off, an empty prepayment meter, or a supply issue — check whether your other gas appliances work), or a fault on the ignition side: the ignition electrode, the flame-sensing electrode, the gas valve, or a blocked burner. These last ones need a Gas Safe engineer to test and confirm.
In cold weather, EA 227 is very often a frozen condensate pipe — the external pipe freezes and backs up, stopping the boiler firing.
What you can safely check yourself
Two things are safe to check. First, make sure your gas is actually on — if your gas hob or another gas appliance won’t work either, the issue is the supply, not the boiler (check the meter and, on a prepayment meter, the credit). Second, in cold weather, check whether the external condensate pipe has frozen and thaw it gently with warm (not boiling) water. After either, reset the boiler once following the manual. If EA 227 comes straight back, stop resetting and call an engineer — repeated resets on a flame fault won’t fix it and aren’t a good idea.
Two things are safe to check. First, make sure your gas is actually on — if your gas hob or another gas appliance won’t work either, the issue is…
When to call us — and how we fix it
If it isn’t the gas supply and isn’t a frozen condensate pipe, EA 227 needs a Gas Safe engineer. We test the ignition and flame-sensing electrodes, check the gas valve and gas pressure, and inspect the burner, then repair the actual cause so the boiler fires reliably again — with a clear price agreed before any work. We fix EA 227 and every other Worcester lockout as Worcester Bosch engineers across East London; if your boiler has simply locked out, our Worcester Bosch reset guide walks you through it.
If it isn’t the gas supply and isn’t a frozen condensate pipe, EA 227 needs a Gas Safe engineer.
Frequently Asked Questions
What does EA 227 mean on a Worcester Bosch boiler?
It's a "no flame detected" lockout — the boiler tried to fire but no flame was sensed, so it shut down safely. It points to the gas, ignition or flame-sensing side.
Can I fix EA 227 myself?
Sometimes. Check your gas is on (do other gas appliances work?) and, in winter, thaw a frozen condensate pipe. Reset once — if it returns, call a Gas Safe engineer.
Why does EA 227 happen in cold weather?
Most often a frozen condensate pipe. The external pipe freezes and backs up, stopping the boiler firing. Thawing it and resetting usually clears it.
EA 227 keeps coming back after I reset — why?
The flame fault is still there. Repeatedly resetting a no-flame lockout won't fix it and isn't advisable — it needs diagnosing by an engineer.
Is an EA 227 lockout dangerous?
The boiler locks out to keep you safe, so it won't run. Don't try to override it — have the cause found and fixed.
Are you Gas Safe registered?
Yes — registration 587401, and we work on Worcester Bosch across East London.
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