e45 High

Remeha e45 Fault Code

Also written as E45 — same fault.

The Remeha e45 fault code means: your boiler's internal computer has suffered a software failure and can no longer process the settings needed to operate safely.. It appears on 5 Remeha models in our database.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: Default parameters. Automation settings. Replace boiler control unit.

What causes the Remeha e45 fault?

This fault occurs when the boiler's internal memory becomes corrupted and loses the essential factory settings required to run. The most common reason is an electrical surge or a terminal component failure on the control board that prevents the computer from reading its own software.

Typical repair cost £280-450 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Remeha models that show the e45 fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Remeha e45 fault code information on this page is sourced and cross-checked against the official Remeha service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026