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 10 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 27 April 2026