47 High
Your boiler has lost its connection to the sensor that monitors water pressure, meaning it can no longer tell if there is enough water to run safely.
Technical description: Water pressure sensor open circuit
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 47 — no call-out fees, no surprises.
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Parts commonly replaced
- Water pressure sensor
- Wiring harness
- Main PCB
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