What does the Alpha 51 fault code mean?

Your boiler is struggling to talk to your wireless thermostat, meaning it doesn't know when to turn your heating on or off.

How much does it cost to fix Alpha error code 51?

Typical repair cost for the Alpha 51 fault is £80-150 including labour.

Alpha 51 Fault Code: What It Means & How to Fix It

What the manual says

Manufacturer manual

Climatic RF communication fault. Error between communication of the Climatic transmitter and boiler receiver

From this model's manual

Verified against the Alpha/Alpha E Tec Regular installation & service manual, page 47.

DIY fix possible

Check if the batteries in your wireless room thermostat are flat and replace them if necessary.Ensure the thermostat is within range of the boiler and has not been moved behind a large metal object or thick wall.Follow your specific model's manual instructions to re-sync or 'pair' the thermostat to the boiler receiver.

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Boiler cover options

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All 37 fault codes on the E-Tec 33

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

01 02 03 04 05 06 07 08 10 12 15 16 20 23 24 25 27 29 31 37 38 43 45 46 47 49 60 61 70 71 75 76 E03 E38 E97 Sr

Your boiler is struggling to talk to your wireless thermostat, meaning it doesn't know when to turn your heating on or off.

What the manual says

DIY fix possible

Avoid the next call-out bill

All 37 fault codes on the E-Tec 33

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