Fast flashing reset button High

Worcester Bosch Fast flashing reset button Fault Code

Also written as FASTFLASHINGRESETBUTTON — same fault.

The Worcester Bosch Fast flashing reset button fault code means: your boiler has encountered a general error and needs to be restarted to see if the system can clear the fault itself.. It appears on 1 Worcester Bosch model 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: A fault has occurred - to reset, press and hold the reset button for five seconds. If the fault remains or recurs then contact Worcester Bosch Service Department.

What causes the Worcester Bosch Fast flashing reset button fault?

This fault occurs when the boiler's internal control system detects an inconsistency or failure during the ignition or operating cycle. The most common reasons include a failure to strike a spark, a signal interruption between the main control board and the internal components, or a fan that is not reaching the required speed. It essentially acts as a safety 'stop' to prevent the boiler from operating under uncertain conditions.

Typical repair cost £100-350 (including labour)

DIY fix possible

Locate the reset button on the front control panel.Press and hold the reset button for exactly five seconds.Wait for the light to stop flashing and see if the boiler ignites.

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Worcester Bosch models that show the Fast flashing reset button fault code

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

Source

Worcester Bosch Fast flashing reset button 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