204 Low
Your boiler is currently taking a short break because it has reached its target temperature and is waiting for the water to cool down slightly before firing up again.
Technical description: The boiler is waiting – the actual temperature is higher than the calculated or selected boiler temperature
Typical repair cost: £0 (including labour)
DIY fix possible
Check that your room thermostat is set to the desired temperatureEnsure at least one or two radiators have their valves fully open to allow heat to dissipateWait 15-20 minutes to see if the code clears itself once the water temperature drops
Protect yourself from future repair bills
A boiler cover plan would cover faults like 204 — no call-out fees, no surprises.
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