Potterton Boiler Fault Codes

1,060 fault codes across 44 Potterton boiler models — explained in plain English.

Long-established UK brand, now part of Baxi Group. Common in older UK homes.

1,060 fault codes
44 models documented
1 currently sold
43 legacy models
Just want the most common Potterton problems?
The top 8 faults across the whole Potterton range — causes, DIY checks, repair costs.
Most serious

High-severity Potterton fault codes

E20
Your boiler is struggling to monitor its temperature correctly because a internal sensor is sending a faulty signal, preventing the heating from working properly.
Promax
 E28
Your boiler has detected a problem with the sensor that monitors the temperature of the exhaust gases, causing the system to shut down for safety.
Promax
 E110
Your boiler has switched itself off because it has become too hot internally and needs to cool down for safety.
Promax
 E119
Your boiler has stopped working because the water pressure in the system has dropped too low and needs topping up.
Promax
 E125
Your boiler has detected that water is not moving through the system correctly, which could be due to a blockage or a pump failure.
Promax
All models

44 Potterton boiler models

Promax
CombiSystemRegular Discontinued
26 fault codes · 2006-2018
Assure Combi / System
CombiSystem
28 fault codes · 2018-present
Main Mersey Super
Regular Discontinued
7 fault codes · 1970-1980
Combi 80
Combi Discontinued
2 fault codes · 1994-2001
Envoy 30
Regular Discontinued
58 fault codes · 1994-1998
Envoy
Regular Discontinued
10 fault codes · 1994-2001
Envoy Plus
Regular Discontinued
19 fault codes · 1997-2004
Flamingo RS40 RS50
Regular Discontinued
18 fault codes · 1970s-1980s
Gold Combi HE
Combi Discontinued
22 fault codes · 2008-2015
Gold HE
Combi Discontinued
16 fault codes · 2008-2013
Housewarmer
Regular Discontinued
12 fault codes · 1994-2003
Kingfisher MF RSL
Regular Discontinued
10 fault codes · 2001-2007
Kingfisher 2 RS60, RS80, RS100
Regular Discontinued
17 fault codes · 1990-2005
Kingfisher MF 40-100
Regular Discontinued
9 fault codes · 2001-2007
Kingfisher MF RSL/CFL
Regular Discontinued
3 fault codes · 1994-2003
Osprey CF 125
Regular Discontinued
7 fault codes · 1994-2005
Performa 24 Eco HE
Combi Discontinued
32 fault codes · 2007-2011
Performa 24
Combi Discontinued
45 fault codes · 2001-2007
Performa 28i
Combi Discontinued
31 fault codes · 2003-2006
Performa SL HE 9 2
Regular Discontinued
17 fault codes · 2007-2010
Performa System HE
System Discontinued
36 fault codes · 2005-2012
Performa 30 HE
Combi Discontinued
16 fault codes · 2005-2011
Powermax HE
Combi Discontinued
104 fault codes · 2001-2009
Prima 30B
Regular Discontinued
42 fault codes · 1994-2001
Promax System HE Plus
System Discontinued
11 fault codes · 2006-2012
Profile 30E
Regular Discontinued
8 fault codes · 1994-2003
Promax 15/2 HE Plus
Regular Discontinued
61 fault codes · 2008-2015
Promax 15 & 24
System Discontinued
7 fault codes · 2006-2012
Promax HE
Regular Discontinued
39 fault codes · 2004-2010
Promax Combi HE Plus
Combi Discontinued
20 fault codes · 2011-2015
Promax FSB 30HE
System Discontinued
16 fault codes · 2006-2008
Promax HE Store
System Discontinued
36 fault codes · 2006-2014
Kingfisher 2
Regular Discontinued
17 fault codes · 1994-2005
Ultra 2 30 DV
Regular Discontinued
18 fault codes · 1997-2004
Puma 80/100
Combi Discontinued
11 fault codes · 1997-2005
Sirius FS
Regular Discontinued
13 fault codes
Sirius WH
System Discontinued
13 fault codes · 2005-2010
Statesman
Regular Discontinued
13 fault codes · 1980-2005
Titanium Combi
Combi Discontinued
20 fault codes · 2010-2015
Profile 60E
Regular Discontinued
15 fault codes · 1994-2003
Suprima HE
System Discontinued
104 fault codes · 2002-2010
Puma 100e
Combi Discontinued
19 fault codes · 1997-2005
Titanium
Combi Discontinued
20 fault codes · 2010-2015
Ultra 2 50 DV
Regular Discontinued
12 fault codes · 1994-2001