What the manual says
Manufacturer manualBoiler start sequence / Standby
Shared across the Assure 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
Check your thermostat or programmer settings to ensure there is a demand for heatTurn up the heating temperature on your wall controllerEnsure your hot water timer is set to be active
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All 35 fault codes on the Assure
Seeing a different code? Every code this model can display, in one place.