110 — Safety thermostat tripped due to overtemperature

What does 110 mean?

The boiler's safety thermostat has activated due to excessively high temperatures, often caused by poor water circulation or air in the system.

• Pump probably blocked or faulty
• Air trapped in the heating circuit
• Faulty limit thermostat

Click steps to track your progress.

1. 1

   Press and hold down the Reset button for 2 seconds to try clearing the fault.

2. 2

   Check the boiler pressure and top up the system if it's too low (refer to 'FILLING THE SYSTEM' in your manual).

3. 3

   Bleed any radiators in the system to remove trapped air, ensuring all radiator valves are fully open.

4. 4

   If the fault persists, contact an Authorised Service Centre to check the pump and thermostat.