OTHER FAULTS High

Worcester Bosch OTHER FAULTS Fault Code

Also written as OTHERFAULTS — same fault.

The Worcester Bosch OTHER FAULTS fault code means: your boiler has detected that the water inside is reaching temperatures that are either too high or too low for safe operation, causing the system to shut down.. It appears on 2 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: FAULT POINT F. Primary water too hot (over 85°C) or too low (less than 75°C). Possible causes: thermistor/heat paste fault, low gas pressure, blocked flue/heat exchanger/burner, or gas valve sticking.

What causes the Worcester Bosch OTHER FAULTS fault?

This fault occurs when the internal sensors detect that the water temperature has strayed outside of its safe operating window, usually due to a lack of circulation or incorrect heat levels. The most common reason is a failing temperature sensor (thermistor) providing inaccurate readings, or a blockage within the heat exchanger that prevents heat from transferring correctly. In some cases, a fault with the gas valve or the main control board can cause the burner to stay on too long, leading to overheating.

Typical repair cost £120-350 (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 OTHER FAULTS fault code

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

Source

Worcester Bosch OTHER FAULTS 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