BoilerFaultCodesWhat the manual says
Manufacturer manualPressure sensor fault
What causes this fault?
This fault occurs when the boiler's internal computer loses communication with the water pressure sensor, meaning it can no longer tell if there is enough water to operate safely. The most common reason is that the sensor itself has developed an electrical internal short or has become blocked by system debris, though it can also be caused by damaged or loose wiring between the sensor and the main control board.
Engineer required
This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Avoid the next call-out bill
A cover plan would handle faults like F73: no call-out fees, no surprise bills.
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Related fault codes
All 52 fault codes on the Flexicom hx
Seeing a different code? Every code this model can display, in one place.