2970 B High
Your boiler has detected that the water pressure in your radiators is falling much faster than expected, which could indicate a significant leak.
Technical description: Pressure drop in heating system too rapid
Typical repair cost: £100-350 (including labour)
DIY fix possible
Check all visible radiator valves and pipework for signs of water leakingTop up the system pressure to between 1 and 1.5 bar using the internal filling linkRestart the boiler to see if the code clears and the pressure remains stable
Protect yourself from future repair bills
A boiler cover plan would cover faults like 2970 B — no call-out fees, no surprises.
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Parts commonly replaced
- Expansion Vessel
- Pressure Relief Valve
- Auto Air Vent
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