BoilerFaultCodesWhat the manual says
Manufacturer manualHeating ignition delay (expressed in min.x10)
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.
DIY fix possible
Wait for the timer to finish (usually 1-3 minutes) to see if the boiler fires up automaticallyCheck that your room thermostat or smart controls are calling for heatCheck if the hot water is working, as this code often appears after the hot water has been used
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All 69 fault codes on the Genus Premium
Seeing a different code? Every code this model can display, in one place.
A17A18A19A20A21A22A33A97A98A99AA0011AA0022AA0033AA0077AA1199AA2200AA2211AA2222AA3333AA9999bb..BOILER SHUTDOWNdd..E 06E 07E 09E 10E 94E 95E04E05E08E20E21E22E23E56E64E66E74E99EE0033EE0044EE0055EE0088EE2200EE2211EE2222EE2233EE5566EE6644EE6666EE7744EE9999L.E.D. GPP/LLS 02S 04S 05S 06S 25S 26S 27S 30S 31S 80UU/FFUU/tt