Red LED five flash sequence Low

Worcester Bosch Red LED five flash sequence Fault Code

Q: What does the Worcester Bosch Red LED five flash sequence fault code mean?

Your boiler is currently running in a manual testing mode at its maximum power, which is likely a temporary setting used by an engineer during a service.

Q: How much does it cost to fix Worcester Bosch error code Red LED five flash sequence?

Typical repair cost for the Worcester Bosch Red LED five flash sequence fault is £80-120 including labour.

Also written as REDLEDFIVEFLASHSEQUENCE — same fault.

The Worcester Bosch Red LED five flash sequence fault code means: your boiler is currently running in a manual testing mode at its maximum power, which is likely a temporary setting used by an engineer during a service.. It appears on 1 Worcester Bosch model in our database.

Technical description: Service mode: Boiler is operating at maximum output.

Typical repair cost £80-120 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Worcester Bosch models that show the Red LED five flash sequence fault code

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

Greenstar CDi Compact Repair: £80-120

Source

Worcester Bosch Red LED five flash sequence 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