BoilerFaultCodesPotterton E19 Fault Code
The Potterton E19 fault code means: your boiler's main control board has encountered an internal electronic error and is unable to manage the system safely.. It appears on 2 Potterton models in our database.
Technical description: Internal control fault
What causes the Potterton E19 fault?
This fault occurs when the boiler's internal computer experiences a critical communication failure or a physical degradation of its electronic components. The most common reason is age-related wear to the capacitors and circuits on the main control board, which prevents it from performing vital safety checks.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Search the official register for a qualified engineer in your area.
Gas Safe Register →Potterton models that show the E19 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Potterton E19 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