BoilerFaultCodesPotterton 19 Fault Code
The Potterton 19 fault code means: your boiler’s internal computer has encountered a critical communication error and cannot operate safely.. It appears on 1 Potterton model in our database.
Technical description: Internal boiler control error
What causes the Potterton 19 fault?
This fault occurs when the boiler's main control board suffers a hardware failure and can no longer communicate with the internal sensors. It is usually caused by electrical components on the circuit board wearing out over time or a loose connection in the internal wiring loom. Because the 'brain' of the boiler can no longer monitor safety, it shuts the entire system down as a precaution.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Potterton models that show the 19 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Potterton 19 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 27 April 2026