E83 481 Medium

Potterton E83 481 Fault Code

Also written as E83481 — same fault.

The Potterton E83 481 fault code means: your boiler is struggling to manage the pressure change as your heating water warms up, which usually indicates the internal vessel that absorbs this expansion needs to be recharged or replaced.. It appears on 1 Potterton model in our database.

Book a service

This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.

Technical description: Expansion Vessel 12 Litre (Primary)
Typical repair cost £180-350 (including labour)

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 E83 481 fault code

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

Source

Potterton E83 481 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