16 Per Sec. High

Potterton 16 Per Sec. Fault Code

Also written as 16PERSEC — same fault.

The Potterton 16 Per Sec. fault code means: your boiler is struggling to ignite the flame reliably and is flickering on and off, which means it cannot provide heat or hot water consistently.. It appears on 2 Potterton 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: Gas and Sparks ON (Green LED)
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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Potterton models that show the 16 Per Sec. fault code

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

Source

Potterton 16 Per Sec. fault code information on this page is sourced and cross-checked against the official Potterton service / installation manuals for each affected model.

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