Adjust, Service, Repair or Replace as necessary
Isolate Mains Power to appliance as per TOPs P4
Isolate Water and Gas as appropriate

Location:
PCB - the DSN number for the appliance was incorrectly set. This is likely to be the cause of the insufficient DHW temperature. It is advisable to re test the DHW after the DSN has been correctly set. Click here to do this.
Upon completion of the fault diagnostics carry out final electrical safety tests and checks as per TOPs (C6).

Refer to ADAPT for further information.

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or Email - Diaglab@britishgas.co.uk