PP6 High
Your boiler has shut itself down because the internal gases have reached an unsafely high temperature to protect the system from damage.
Technical description: Discharge gas overheat protection
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 PP6 — no call-out fees, no surprises.
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Parts commonly replaced
- Heat exchanger NTC sensor
- Circulation pump
- Main heat exchanger
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