Worcester Bosch 227 V: No flame signal after ignition

227 V on a Worcester Bosch boiler means: no flame signal after ignition. The boiler tried to light (or keep the flame lit) but could not detect a flame, so it locked out for safety.

This code applies to Worcester Bosch 8000 Style / 8000 Life. Codes can mean different things on different models, so check the display against your boiler's user manual.

What you can safely check

• Check that other gas appliances, like the hob, are working. If they aren't, the problem is your gas supply rather than the boiler.
• If you have a prepayment meter, make sure it is in credit.
• Check the gas isolation valve on the pipe into the boiler and at the meter is open (the handle in line with the pipe).
• In freezing weather, check the condensate pipe — the plastic pipe running from the boiler outside to a drain. If it is frozen, thaw it by pouring warm (not boiling) water over it or holding a hot water bottle against it.
• Press reset once, following the instructions in your user manual.

When to call an engineer

If the code returns after a single reset, call a Gas Safe engineer. Causes include the ignition electrode, flame sensor, gas valve or flue, all of which are inside the sealed casing.

Never remove the boiler casing yourself — everything behind it must be handled by a Gas Safe registered engineer. If you smell gas, open windows, turn the gas off at the meter, and call the National Gas Emergency number on 0800 111 999.