High
Dry-fire Lockout on Potterton Promax 15 & 24

Your boiler has stopped working because it cannot detect enough water inside to safely heat your home.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

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

Failure caused by lack of water in system, pump not running, or faulty flow switch/thermistor.

Engineer required

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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