Medium
51 on Alpha E-Tec Plus NX

Your boiler has lost its wireless connection to your room thermostat, meaning it no longer knows when to turn your heating on or off.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Book a service

This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.

What the manual says

Manufacturer manual

Communication failure with Climatic wireless

Shared across the Alpha E-Tec Plus 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.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

DIY fix possible

Check that your wireless thermostat has fresh, working batteries.Ensure the wireless receiver box (usually wired near the boiler) has a power light showing.Attempt to re-pair the thermostat to the receiver by following the specific reset/sync instructions in your thermostat manual.

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Related fault codes

50View →52View →

All 39 fault codes on the E-Tec Plus NX

Seeing a different code? Every code this model can display, in one place.

0102030405060708101215162023242729313637384344454647484960617075768388 8898138139

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