How much does it cost to fix Worcester Bosch error code Fault 53 128?

Typical repair cost for the Worcester Bosch Fault 53 128 fault is £90-180 including labour.

Fault 53 128 High

Worcester Bosch Fault 53 128 Fault Code

Q: What does the Worcester Bosch Fault 53 128 fault code mean?

Your boiler has detected that a temperature sensor is sending an unusual reading, suggesting it may have been knocked out of place or is reporting a sudden, impossible heat spike.

Also written as FAULT53128 — same fault.

The Worcester Bosch Fault 53 128 fault code means: your boiler has detected that a temperature sensor is sending an unusual reading, suggesting it may have been knocked out of place or is reporting a sudden, impossible heat spike.. It appears on 1 Worcester Bosch model in our database.

Technical description: Temperature sensor fitted in wrong location.

What causes the Worcester Bosch Fault 53 128 fault?

This fault occurs when the boiler detects a sudden, rapid temperature rise that seems physically impossible under normal operation. It usually happens because the temperature sensor has become loose, has been clipped into the wrong position, or is failing and sending incorrect electrical signals to the internal computer.

Typical repair cost £90-180 (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 Fault 53 128 fault code

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

Greenstar CDi Compact Repair: £90-180

Source

Worcester Bosch Fault 53 128 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