Low
203 on Worcester Bosch 2000 GC2000iW 25 C NG

Your boiler is perfectly healthy 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

Boiler in standby, no heat energy demand (Operating message, is not a fault)

From this model's manual
Verified against the Worcester Bosch/Worcester Bosch 2000 Gc2000iw 2019 installation & service manual, page 79.
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 that your room thermostat or heating programmer is set to 'on'Ensure the hot water tap is fully open if you are testing for hot water

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Related fault codes

204View →

All 144 fault codes on the 2000 GC2000iW 25 C NG

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

20020120220420720821221421522422722822923223323423523723824224424524624724925025125225325425625725825926226326426526826927027327528130530632332834134235035135635735836036236336436560481081510131014101710181021102210231065106810731074107510762051208529082909291029112912291329142915291629172918292029212922292329242925292629272928293029312932294029412942294329452946294729482949295029512952295329542955295629572958295929602961296229632964296529662967296829692971297229732974b1C1C4C6Constant redd1d3E2Flashing red

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