Too Many Restarts High

Keston Too Many Restarts Fault Code

Also written as TOOMANYRESTARTS — same fault.

The Keston Too Many Restarts fault code means: your boiler has attempted to restart itself multiple times in a short window because it keeps encountering a recurring problem, and it has now locked itself out to prevent damage.. It appears on 4 Keston 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: The boiler attempted to restart 5 times within 15 minutes
Typical repair cost £150-350 (including labour)

Engineer required

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

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Keston models that show the Too Many Restarts fault code

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

Source

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

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 31 August 2026