E01 373 High

Ideal E01 373 Fault Code

Also written as E01373 — same fault.

The Ideal E01 373 fault code means: your boiler has failed to ignite or stay lit, meaning it cannot produce heat or hot water because it has detected a problem with the flame or gas supply.. It appears on 1 Ideal model 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: LH AEROMATIC No. AC 19/123 297; RS 3/125
Typical repair cost £150-300 (including labour)

Engineer required

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

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Ideal models that show the E01 373 fault code

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

Source

Ideal E01 373 fault code information on this page is sourced and cross-checked against the official Ideal service / installation manuals for each affected model.

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