What the manual says
Manufacturer manualOFF MODE set on boiler (fault only displayed on remote device)
From this model's manual
Verified against the Alpha/Alpha E Tec Plus Nx installation & service manual.
DIY fix possible
Check your wireless room thermostat or heating programmer to see if it is currently set to 'Off'.Turn the heating schedule or manual override back to 'On' or 'Auto'.If using a smart app (like a smartphone control app), check that the master mode isn't set to holiday or off mode.
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All 37 fault codes on the E-Tec Plus 28NX
Seeing a different code? Every code this model can display, in one place.