Fault 11 Codes 131 or 132 — System configuration, new ISM detected

What does Fault 11 131-132 mean?

The Worcester Bosch Greenstar CDi Boiler displays Fault 11 with code 131 or 132, indicating that a new ISM (Internal System Module) has been detected within the system configuration.

• A new ISM has been installed or reconnected
• System configuration needs to be updated after hardware change

Click steps to track your progress.

1. 1

   Ensure all ISMs are powered up simultaneously.

2. 2

   Initiate the automatic system configuration process as described in your boiler's manual.

3. 3

   Monitor the system to confirm that the new ISM is correctly recognized and the fault clears.