BoilerFaultCodesPotterton E83486 Fault Code
The Potterton E83486 fault code means: your boiler has detected a communication problem or a electrical fault with the sensor that monitors water pressure, which has caused the system to stop working for safety.. It appears on 1 Potterton model in our database.
Technical description: Pressure Sensor ‘Ranco’Black
What causes the Potterton E83486 fault?
This fault occurs when the boiler's main control board loses electrical contact with the sensor that monitors water pressure. The most common reason is a physical failure within the Ranco sensor itself or a loose connection in the wiring harness that links the sensor to the brain of the boiler.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Gas Safe Register →Potterton models that show the E83486 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Potterton E83486 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