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E9 277 FAULT CODE
Worcester Bosch

Safety Sensor High Temperature (GB162)

High Severity Engineer Required

On Worcester GB162 commercial boilers, code E9 277 means the safety temperature sensor has measured a temperature above 95°C.

Step-by-Step Fix Guide

  1. Step 1

    Turn off the boiler

  2. Step 2 Engineer only

    Call a Gas Safe engineer immediately

Gas Safe Reminder

Work on gas appliances must be carried out by a Gas Safe registered engineer. The steps above cover safe checks a homeowner can perform - any internal component replacement requires a qualified professional. If in doubt, always call an engineer.

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