722 Medium
One of your secondary heating zones has reached a temperature that is too high, causing the system to stop as a safety precaution.
Technical description: Overheating in zone 2
Typical repair cost: £100-280 (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 722 — no call-out fees, no surprises.
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Parts commonly replaced
- Zone valve
- Zone 2 temperature sensor
- External pump
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