Potterton Suprima Fault codes & diagnostics

9 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.

Gas 2001 onwards Discontinued
GC Numbers 41-590-4241-590-4341-590-4441-590-45
Download the Potterton Suprima manual The official installation & service manual (PDF) — the exact document these fault codes were verified against. PDF

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Severity at a glance

Each cell = one fault code. Hover to identify.
9 Unrated
Versions & GC numbers

Which version do you have?

The GC number on your boiler's data badge identifies the exact appliance and production years, as recorded in the UK Product Characteristics Database.

GC number Appliance (register name) Produced
41-590-42 Suprima 30L 2001–2005
41-590-43 Suprima 40L 2001–2006
41-590-44 Suprima 50L 2001–2010
41-590-45 Suprima 60L 2001–2010

Appliance names and production years are taken from the UK Product Characteristics Database (the SAP/SEDBUK register). Where a GC number is also printed in this model's own manufacturer manual, both sources were checked to agree.

Just want the most common Potterton Suprima faults?
The top 6 problems in plain English — with causes, DIY checks and repair costs.
Fault codes

All 9 documented codes

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