117 Emergency
Your boiler has detected that the water pressure inside the system is far too high, causing it to shut down for safety.
Technical description: Pressure greater than 3 bar or pump pressure increase is too high
Typical repair cost: £100-280 (including labour)
DIY fix possible
Locate a radiator bleed valve and use a key to release water into a container until the pressure gauge on the boiler drops to 1.5 bar.Ensure the blue or black filling loop handles under the boiler are fully tightened in the closed position.Check if the filling loop hose is still attached and disconnect it if it is a removable type.
Protect yourself from future repair bills
A boiler cover plan would cover faults like 117 — no call-out fees, no surprises.
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Parts commonly replaced
- Filling loop valve
- Expansion vessel
- Pressure relief valve (PRV)
- Water pressure sensor
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