Overheat safety trip High

Gledhill Overheat safety trip Fault Code

Also written as OVERHEATSAFETYTRIP — same fault.

The Gledhill Overheat safety trip fault code means: your boiler has switched itself off to prevent it from getting too hot and causing internal damage.. 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: ON : Overheat safety trip - Press S1 to reset
Typical repair cost £100-250 (including labour)

DIY fix possible

Wait for the boiler to cool down completelyLocate the S1 reset button on the control panelPress and hold the button to clear the fault and restart the unit

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Gledhill models that show the Overheat safety trip fault code

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

Source

Gledhill Overheat safety trip 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