F.73 High
Your boiler is unable to accurately measure the water pressure because the internal sensor is sending an incorrect or missing signal.
Technical description: Water pressure sensor signal in the wrong range, it is too low
Typical repair cost: £140-£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 F.73 — no call-out fees, no surprises.
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Parts commonly replaced
- Water Pressure Sensor
- Sensor Wiring Harness
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