1p4 High
Your boiler has detected that water is circulting too slowly or there is not enough water pressure to run safely.
Technical description: Clas Net one CombiClas one CombiClas System one
Typical repair cost: £0-280 (including labour)
DIY fix possible
Check the pressure gauge on the front of the boiler; it should be between 1 and 1.5 bar.If the pressure is too low, use the filling loop underneath the boiler to top it up carefully.Ensure all radiator valves are fully open and check for any visible leaks around the pipework.
Protect yourself from future repair bills
A boiler cover plan would cover faults like 1p4 — no call-out fees, no surprises.
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Parts commonly replaced
- Circulation Pump
- Main Heat Exchanger (De-scaling)
- Water Pressure Sensor
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