0A80 High
Your boiler is struggling to monitor the temperature of the water moving through the system, which causes it to shut down for safety after running for a short time.
Technical description: Flow and return sensor connection fault (may occur after several minutes of boiler operation.)
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 0A80 — no call-out fees, no surprises.
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Parts commonly replaced
- Flow temperature NTC sensor
- Return temperature NTC sensor
- Wiring harness
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