Potterton Performa 28 Fault codes & diagnostics

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

Combi Natural Gas 24-28 kW 2001-2011 Discontinued

GC Number 47-393-07

Replaced by: Potterton Titanium

Download the Potterton Performa 28 manualThe official installation and service manual (PDF), the document these fault codes were read from. PDF

The fault code is already on your display

Note it down before pressing reset — resetting clears the code immediately. How to read fault codes →

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
47-393-07	Performa 28	2001–2011

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.

Fault codes

All 2 documented codes

Tap any card for details

What to check first

Check that your system pressure is between 1 and 1.5 bar on the pressure gauge
Ensure all radiator valves are fully open
Bleed your radiators to remove any trapped air pockets

Parts commonly replaced

Circulation Pump
Primary Heat Exchanger (De-scaling)
Flow Temperature Sensor

Related codes

Parts commonly replaced

Wiring harness
Main PCB
Earthing wire