What the manual says
Manufacturer manualClimatic RF communication fault
From this model's manual
Verified against the Alpha/Alpha Evoke Nx installation & service manual.
DIY fix possible
Check the batteries in your wireless thermostat and replace them if they are low.Ensure the wireless receiver near the boiler is powered on and hasn't been blocked by metal objects.Try resetting the boiler and the thermostat to re-establish the wireless link.
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All 25 fault codes on the Evoke 28NX
Seeing a different code? Every code this model can display, in one place.