S.34 Low
Your boiler has detected very cold temperatures and has automatically turned itself on to prevent the internal pipes from freezing.
Technical description: Anti-frost mode is active
Typical repair cost: £0 (including labour)
DIY fix possible
Check that your external condensate pipe is not frozenEnsure your thermostat is set to your desired temperatureWait for the boiler to finish its warming cycle and return to normal operation
Protect yourself from future repair bills
A boiler cover plan would cover faults like S.34 — no call-out fees, no surprises.
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