Low
Neon L1 on Halstead Hero

Your boiler is connected to the electricity supply and is waiting for a request to provide heating or hot water, so everything is working exactly as it should.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

What the manual says

Manufacturer manual

Stand-by / Power on indicator

Shared across the Hero range
This code is shared by the boilers in this range, which use the same control board. It may not be printed in this exact variant’s manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

DIY fix possible

No action is required as this is the normal standby lightTurn on your central heating or hot water at the programmerCheck your thermostat settings to ensure heat is requested

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All 14 fault codes on the Hero

Seeing a different code? Every code this model can display, in one place.

BURNER LIT NEONBURNER ONDEMAND NEONFAN NEONFLAME FAILURE NEONLOCK OUTNeon L2Neon L3Neon L4Neon L5Neon L6OVERHEAT NEONSTANDBY NEON

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