E9 276 — Primary flow temperature exceeded 95°c

What does E9 276 mean?

The primary flow temperature has exceeded 95°C. This indicates a potential overheating issue in the boiler's main heating circuit.

• Restricted water flow in the primary circuit.
• Pump malfunction.
• Faulty flow temperature sensor.
• Heat exchanger blockage.

Click steps to track your progress.

1. 1

   Turn off the boiler immediately and allow it to cool down.

2. 2

   Check the system pressure and top up if it is low.

3. 3

   Ensure all heating zone valves are open and radiators are not blocked.

4. 4

   Contact a Gas Safe registered engineer to diagnose the cause of the overheating.