BoilerFaultCodesWhat the manual says
Manufacturer manualClimatic RF communication fault
Shared across the Alpha E-Tec 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 if the batteries in your wireless room thermostat or programmer are flat and replace them if necessary.Turn the boiler off at the fused spur for 60 seconds, then turn it back on to force a communication reset.Ensure the wireless receiver unit near the boiler is not obstructed by large metal objects or electrical interference.
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Related fault codes
All 54 fault codes on the E-Tec NXS
Seeing a different code? Every code this model can display, in one place.