30 Low

Potterton 30 Fault Code

The Potterton 30 fault code means: your boiler is currently focused on providing hot water for your taps and shower rather than heating your radiators.. It appears on 3 Potterton models in our database.

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

Technical description: Domestic Hot Water Mode

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 30 fault code

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

Source

Potterton 30 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