0A7 High
Your boiler has shut down because the exhaust gases have become too hot, which is a safety feature to prevent damage to the internal components.
Technical description: High flue temperature fault
Typical repair cost: £150-450 (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 0A7 — 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
- Main Heat Exchanger
- Flue NTC Sensor
- Flue collector
*Affiliate links — we may earn a commission at no extra cost to you.