E9224On Worcester Bosch boilers, fault code E9 224 means: Overheating (safety limit tripped). Do not keep resetting or using the boiler. Switch it off and call a qualified gas engineer. If you smell gas, leave the building and call the gas emergency number.
Can I keep using the boiler?
Do not keep resetting or using the boiler. Switch it off and call a qualified gas engineer. If you smell gas, leave the building and call the gas emergency number.
Common causes
- Low water flow or blocked heat exchanger
- Air in the system or blocked circulation (closed valves, sludge)
- Faulty pump or pump blocked by debris
How to fix it
- Make sure the radiator and boiler valves are open
- Top up the pressure to about 1–1.5 bar with the filling loop or tap (see your manual)
- Press the boiler's reset button once and wait for it to restart
- Don't keep resetting: if the code returns, switch off and call a qualified gas engineer
Frequently asked questions
What does Worcester Bosch error E9 224 mean?
On Worcester Bosch boilers, fault code E9 224 means: Overheating (safety limit tripped).
How do I fix Worcester Bosch error E9 224?
Start with these steps: Make sure the radiator and boiler valves are open; Top up the pressure to about 1–1.5 bar with the filling loop or tap (see your manual); Press the boiler's reset button once and wait for it to restart; Don't keep resetting: if the code returns, switch off and call a qualified gas engineer.
Is it safe to use the boiler with fault E9 224?
Severity: High. Do not keep resetting or using the boiler. Switch it off and call a qualified gas engineer. If you smell gas, leave the building and call the gas emergency number.