2965 B High
Your boiler has shut down because the water inside is getting much hotter than it should be, which is often caused by a blockage or a pump failure preventing the heat from moving away.
Technical description: Flow temperature too high
Typical repair cost: £120-£350 (including labour)
DIY fix possible
Check that all radiator valves are fully open to allow water to circulate.Ensure your boiler pressure gauge is between 1 and 1.5 bar; top up if necessary.Check if any external bypass valves or magnetic system filters are blocked.
Protect yourself from future repair bills
A boiler cover plan would cover faults like 2965 B — no call-out fees, no surprises.
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Parts commonly replaced
- Circulation Pump
- Flow Temperature Sensor (NTC)
- Main Heat Exchanger (Flushing required)
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