BoilerFaultCodesYour boiler has lost its ability to monitor water pressure because the internal sensor has developed an electrical fault.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: LOSS OF WATER PRESSURE SENSOR: SENSOR IN SHORT CIRCUIT OR HAS ISOLATION FAULT. CHECK THE ELECTRICAL CONNECTIONS.
What causes this fault?
This fault occurs when the boiler's internal computer can no longer read the water pressure because the sensor's electrical circuit has failed. The most common reason is that the sensor has either suffered an internal short circuit or the connecting wires have become loose or damaged over time.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Protect yourself from future repair bills
A boiler cover plan would cover faults like 09 — no call-out fees, no surprises.
Affiliate links — we may earn a commission at no extra cost to you.
Glow-worm Xtramax is discontinued — time for a new one?
Parts for discontinued models can be hard to find and expensive. A new A-rated boiler could save you money on both repairs and energy bills.
Affiliate links — we may earn a commission at no extra cost to you.