é43 High

Remeha é43 Fault Code

Also written as 43 — same fault.

The Remeha é43 fault code means: your boiler has detected that some of its internal settings have drifted outside of their safe operating limits, and it has stopped working as a precaution.. It appears on 9 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: Parameter limits
Typical repair cost £120-250 (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 é43 fault code

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

Source

Remeha é43 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 31 August 2026