Low
283 on Worcester Bosch Hideaway 90

Your boiler is simply performing its normal startup sequence and checking that safety components are ready before lighting the flame.

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

The boiler is preparing for a burner start – the fan and pump are activated

Shared across the 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

Wait a few minutes for the startup cycle to completeEnsure your thermostat is calling for heatCheck that the gas supply is turned on if the code persists

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