2971 B High
Your boiler has detected that the water pressure in your heating system is too low to operate safely and effectively.
Technical description: System pressure too low – the heating system needs venting or water needs topping up until the preset pressure is reached. Replace the cable to the pressure sensor replace the pressure sensor
Typical repair cost: £0-180 (including labour)
DIY fix possible
Check the pressure gauge on the front of the boiler; it will likely be in the red zone.Locate the filling link (either a built-in lever or a flexible silver hose) and slowly turn it to add water.Monitor the gauge and stop once it reaches between 1 and 1.5 bar, then ensure the filling link is fully closed.
Protect yourself from future repair bills
A boiler cover plan would cover faults like 2971 B — no call-out fees, no surprises.
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Parts commonly replaced
- External Filling Link
- Water Pressure Sensor
- Pressure Sensor Wiring Harness
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