What does the Alpha 45 fault code mean?

Your boiler is struggling to move water through the system efficiently, causing a sharp temperature difference that has triggered a safety shutdown.

How much does it cost to fix Alpha error code 45?

Typical repair cost for the Alpha 45 fault is £120-250 including labour.

Manufacturer manual

High ΔT The boiler detects a sudden, unexpected increase in ΔT between the flow sensor and the system return sensor

Shared across the Alpha E-Tec 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 45: no call-out fees, no surprise bills.

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