Low
132 on Worcester Bosch Greenstar CDi Compact

Your boiler has detected a new smart accessory or controller has been connected to its communication system and needs to be formally recognised.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

What the manual says

Manufacturer manual

Fault 11 System configuration: new BUS device: New ISM detected

From this model's manual
Verified against the Worcester Bosch Greenstar Cdi Compact installation & service manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

DIY fix possible

Ensure any recently installed thermostat or smart accessory is wired correctlySwitch the boiler off at the fused spur for 60 secondsTurn the power back on to force the boiler to re-scan for connected devices

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Related fault codes

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