Fault 51 / 132 Medium

Worcester Bosch Fault 51 / 132 Fault Code

Also written as FAULT51132 — same fault.

The Worcester Bosch Fault 51 / 132 fault code means: your boiler has detected that the wrong type of sensor has been installed or connected for your hot water system, causing a communication error within the internal electronics.. It appears on 2 Worcester Bosch models in our database.

Book a service

This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.

Technical description: Incorrect temperature sensor type connected: Temperature sensor type PTC 1000 used as cylinder temperature sensor (T2).

What causes the Worcester Bosch Fault 51 / 132 fault?

This fault occurs when the boiler's control board detects an electrical signal from a water temperature sensor that it doesn't recognize or expect. The most common reason is that a specific type of sensor used for an external hot water cylinder has been installed incorrectly, or the existing sensor has developed an internal electrical fault that makes it appear incompatible.

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 51 / 132 fault code

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

Source

Worcester Bosch Fault 51 / 132 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