What does the Alpha B illuminated continuously fault code mean?

Your boiler has tried to start but could not ignite the flame, so it has locked itself out for safety.

How much does it cost to fix Alpha error code B illuminated continuously?

Typical repair cost for the Alpha B illuminated continuously fault is £120-250 including labour.

Manufacturer manual

Burner has failed to light. Rotate selector switch to reset position (3) and the ignition sequence will restart after a delay of about 30 seconds.

Shared across the Alpha CD 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.

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 B illuminated continuously: 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.

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