En High

Gledhill En Fault Code

Also written as EN — same fault.

The Gledhill En fault code means: your boiler has detected that one of its internal sensors is sending an incorrect signal or has failed, which is preventing the system from operating correctly.. It appears on 1 Gledhill 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: sensor selected is faulty (where n is the error type)
Typical repair cost £120-£240 (including labour)

Engineer required

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

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Gledhill models that show the En fault code

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

Source

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

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026