227 High

Worcester Bosch 227 Fault Code

The Worcester Bosch 227 fault code means: your boiler is failing to light the gas even though it is trying to, which prevents your heating and hot water from working.. It appears on 9 Worcester Bosch models in our database.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: No flame signal after ignition

What causes the Worcester Bosch 227 fault?

This fault occurs when the boiler's internal control system cannot detect a flame after several attempts to light the gas. The most common reasons include a lack of gas supply to the unit, worn-out ignition parts that can no longer create a spark, or sensors that have become too dirty to 'see' the flame. It effectively means the boiler is entering a safety mode because it thinks it is unsafe to continue trying to ignite.

This fault is frequently seen during extreme cold snaps, as a frozen condensate pipe can back up into the boiler and prevent the burner from lighting.

Typical repair cost £120-350 (including labour)

DIY fix possible

Check if other gas appliances (like a hob) are working to ensure gas is reaching the propertyCheck if your gas meter has credit (if using a pre-payment meter)Hold the 'Reset' button on the front of the boiler for 3 seconds

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Worcester Bosch models that show the 227 fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Worcester Bosch 227 fault code information on this page is sourced and cross-checked against the official Worcester Bosch service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026