NO CODE 212 High
Your boiler is shutting down because it is heating up much faster than it should, usually due to water not flowing through the system properly.
Technical description: Safety or flow temperature rising too fast
Typical repair cost: £100-£350 (including labour)
DIY fix possible
Check that your radiator valves are fully openEnsure the central heating system pressure is between 1.0 and 1.5 barBleed all radiators to remove trapped air that might be blocking flow
Protect yourself from future repair bills
A boiler cover plan would cover faults like NO CODE 212 — no call-out fees, no surprises.
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Parts commonly replaced
- Circulation Pump
- Heat Exchanger (De-scaling)
- Flow Temperature Sensor
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