Low
STANDBY NEON on Halstead Hero

Your boiler is perfectly fine and is simply waiting for you to turn on a tap or adjust your heating thermostat.

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

Neon light indicating the appliance is connected to power but not in active demand.

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

Check your room thermostat is set higher than the current room temperatureEnsure your heating timer or programmer is set to 'on'Run a hot water tap to see if the boiler fires up

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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 L1Neon L2Neon L3Neon L4Neon L5Neon L6OVERHEAT NEON

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