This is not a fault code. Hense why you cannot find it in the service and installation book. This is a special feature of some Worcester CDi boilers .It is actually a reminder that the boiler requires a service based on burner hours.

To reset the code follow this steps;

• Press and hold Spanner button until it becomes orange

• Press and hold Eco button until 5A displays

• CS press and release Eco button

• press and release CS

• Hold Until brackets appear then release

• then press spanner button

Check if the burner requires cleaning by following the test producer using a mano-meter on the internal test point as outlined in the service and installations manual.

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