What does the Alpha 51 fault code mean?

Your boiler has lost its wireless connection to the temperature controller, 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 £90-180 including labour.

Replace the batteries in your wireless room thermostat unit.

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

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

Safety-critical — turn off, read this.

7 signs repair isn't worth it anymore.

Break-even maths on monthly cover.