1022 B High

Worcester Bosch 1022 B Fault Code

Also written as 1022B — same fault.

The Worcester Bosch 1022 B fault code means: your boiler is unable to read the temperature of your hot water tank, which means your taps and showers may not get hot.. It appears on 10 Worcester Bosch models 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: Hot water storage temperature sensor is defective – connect the plug to the hot water temperature sensor correctly, mount the hot water temperature sensor correctly or replace the hot water temperature sensor

What causes the Worcester Bosch 1022 B fault?

This fault occurs when the boiler loses communication with the sensor that monitors the temperature inside your hot water cylinder. The most common reason is that the sensor has developed an internal electrical failure, or the wiring connecting the sensor to the boiler has become loose or damaged. Without this data, the boiler shuts down hot water production as a safety precaution to prevent overheating.

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 1022 B fault code

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

Source

Worcester Bosch 1022 B 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