Poor performance / noises High

Worcester Bosch Poor performance / noises Fault Code

Q: What does the Worcester Bosch Poor performance / noises fault code mean?

Your boiler is struggling to breathe or burn gas correctly, which is causing unusual sounds and preventing it from heating your home efficiently.

Q: How much does it cost to fix Worcester Bosch error code Poor performance / noises?

Typical repair cost for the Worcester Bosch Poor performance / noises fault is £150-450 including labour.

Also written as POORPERFORMANCENOISES — same fault.

The Worcester Bosch Poor performance / noises fault code means: your boiler is struggling to breathe or burn gas correctly, which is causing unusual sounds and preventing it from heating your home efficiently.. It appears on 1 Worcester Bosch model in our database.

Technical description: Fan / fan harness. Sensors not fixed or out of specification. Gas pressure / blockage. Water pressure / blockage. CO2 mix. Flue blockage.

Typical repair cost £150-450 (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 Poor performance / noises fault code

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

Greenstar i Repair: £150-450

Source

Worcester Bosch Poor performance / noises 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