PP3 High
Your boiler has stopped working because an internal sensor that monitors the temperature of the heating coil is no longer sending a correct reading.
Technical description: Coil temperature sensor failure
Typical repair cost: £110-190 (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 PP3 — no call-out fees, no surprises.
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Parts commonly replaced
- Coil temperature sensor (NTC)
- Sensor wiring harness
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