What does the Alpha 51 fault code mean?

Your boiler is struggling to talk to your wireless thermostat, which means 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 £100-250 including labour.

Check if the batteries in your wireless room thermostat are dead and replace them with high-quality alkaline batteries.

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 Intec2 25 28xe installation & service manual.

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

Boiler cover options

A cover plan would handle faults like 51: no call-out fees, no surprise bills.

Approved partner

Domestic Appliance Guard

Unlimited call-outs, 24/7 helpline, no price-hike promise

Affiliate links. We may earn a commission at no extra cost to you.

Work through these before the call-out.

7 signs repair isn't worth it anymore.

Break-even maths on monthly cover.