D.2 Low
Your boiler is temporarily resting because it has reached its target temperature and is waiting for a short period before restarting to prevent unnecessary wear and tear.
Technical description: Max burner anti-cycling period at 20c flow temperature
Typical repair cost: £0-80 (including labour)
DIY fix possible
Check that your room thermostat or programmer is set to a high enough temperatureOpen any radiator valves (TRVs) fully in the room with the main thermostatWait 15 minutes to see if the status code clears and the boiler fires back up automatically
Protect yourself from future repair bills
A boiler cover plan would cover faults like D.2 — no call-out fees, no surprises.
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Parts commonly replaced
- None (Normal operation)
- External Thermostat
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