E9 224 High
Your boiler has shut down because a safety sensor has detected that the system is overheating or the sensor itself has a loose connection.
Technical description: The contacts of the safety temperature sensor have been interrupted
Typical repair cost: £120-250 (including labour)
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Protect yourself from future repair bills
A boiler cover plan would cover faults like E9 224 — no call-out fees, no surprises.
*Affiliate links — we may earn a commission at no extra cost to you. Prices shown are starting prices.
Parts commonly replaced
- Safety temperature sensor
- Overheat thermostat
- Wiring harness
*Affiliate links — we may earn a commission at no extra cost to you.