BoilerFaultCodesPotterton E83458 Fault Code
The Potterton E83458 fault code means: your boiler has detected a communication failure or a mechanical fault with the fan, meaning it cannot safely clear exhaust fumes and will not start.. It appears on 1 Potterton model in our database.
Technical description: Fan Assembly c/w ‘O’Ring & Gasket
What causes the Potterton E83458 fault?
This fault occurs when the boiler's main control board loses touch with the fan or detects that it isn't spinning at the correct speed. The most common reason is that the fan motor has burnt out or seized, but it can also be caused by loose wiring connections or a failing control board that can no longer send power to the fan.
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 E83458 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Potterton E83458 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