Table of Contents
Potterton Boiler Error Codes
Potterton are well known for their boilers which are reasonably priced and reliable to use. They always aim for high performance and use top-quality parts.
That being said, boilers of top quality do sometimes tend to have certain issues. On this page you will find the error codes or faults of Potterton boilers and what they indicate, in addition to possible ways to fix these issues.
A short history of Potterton
Potterton dates back as far as 1850. This makes it one of the oldest boiler brands in business. It was founded by Thomas Potterton in Balham, London. They have completed their first gas boiler installation in 1902.
Potterton is actually a part of BDR Thermea Group. A company which is one of the largest manufacturers and suppliers of beating and how water products across Europe. They operate in more than 70 countries and have a staff of 60,000 employees around the globe.
Potterton produce a wide range of boilers that you can choose from. They offer boilers from the standard core range, the Promax range, the Ultra Heat range, and the Assure range; to their more premium ranges, such as the Gold and Titanium range. When it comes to warranty, then they offer a warranty of 1-7 years. That, of course, depends on the model of the boiler.
It is important to keep in mind that in order for a warranty to be valid, your boiler must be registered within 30 days of installation and it should also have annual service. The Benchmark Commissioning Checklist must also be completed and given to the householder by the Gas Safe engineer. Your warranty will be void if these guidelines are not followed.
Promax Combi, System, and Store Error Codes
| Fault Codes | The Cause |
| E10 | Outdoor sensor error |
| E20 | Central heating thermistor sensor fault |
| E28 | Flue thermistor fault |
| E50 | Domestic hot water sensor fault |
| E110 | Boiler overheat tripped |
| E119 | System pressure too low |
| E125 | Primary water circulation fault |
| E130 | Flue thermostat sensor tripped (lockout) |
| E131 | Flue overheat lockout |
| E133 | Ignition fault |
| E151 | Printed circuit board (PCB) error |
| E152 | PCB error |
| E160 | Fan fault |
| E161 | Fan fault |
| E164 | Domestic hot water sensor error – could be a heating flow switch error) |
| E167 | Printed circuit board (PCB) fault |
| E168 | Printed circuit board (PCB) lockout |
| E193 | Circulation |
Potterton Assure Combi and system Boiler Error Codes
| Fault Code | The Cause |
| E09 | Gas valve connection cable fault |
| E10 | External probe fault |
| E12 | Differential water flow switch is still open |
| E13 | Differential water flow switch is still closed |
| E15 | Fault with the gas valve command |
| E20 | Central heating negative temperature coefficient (NTC) fault |
| E28 | Flue negative temperature coefficient (NTC) fault |
| E40 | Central heating return negative temperature coefficient (NTC) fault |
| E50 | Domestic hot water (DHW) negative temperature coefficient (NTC) sensor (tank boiler) (s.c) or DHW NTC sensor (tank boiler) (o.c.) Fault |
| E83 / E84 / E85 / E86 / E87 | Communication error |
| E109 | Pre-circulation fault |
| E110 | Boiler Max temperature exceeded for gradient (or overtemperature) Probable pump jammed or air in the circuit or Safety thermostat sensor tripped |
| E118 | Primary system water pressure too low |
| E125 | Primary circulation fault |
| E128 | Flame failure (12 times) |
| E129 | Frequent loss of flame (safety error) |
| E130 | Flue thermostat sensor tripped and locked out |
| E133 | Possible gas supply issue (failure to light) |
| E134 | Elapsed time gas valve open without gas |
| E135 | Internal error (interruption of gas supply) |
| E154 | Flow/return sensor temperature test |
| E160 | Problem with fan (possible wiring fault) |
| E163 | Domestic hot water (DHW) negative temperature coefficient (NTC) sensor fault (s.c.) or DHW NTC sensor fault (o.c.) |
| E270 | Dry fire |
| E317 | Wrong power supply (HZ) |
| E321 | Hot water fault |
| E384 | False flame |
| E385 | Under voltage |
| E430 | Water pressure test |
| E430 + Flame crossed | Water pressure test failed |
Potterton Promax Ultra, Gold/Titanium Combi & System Boiler Error Codes
| Fault Code | The Cause |
| E09 | Gas valve wiring fault |
| E10 | Outdoor sensor error |
| E15 | Gas valve connection fault |
| E20 | Central heating thermistor sensor fault |
| E28 | Flue thermistor fault |
| E40 | Central heating return thermistor fault |
| E50 | Domestic hot water sensor fault |
| E53 | Flue obstruction |
| E55 | Calibration required |
| E78 | Water pressure sensor fault |
| E83 / 84 / 85 / 86 / 87 | No communication between room controller and boiler |
| E92 | Combustion test alarm during auto-setting |
| E109 | Poor circulation |
| E110 | Boiler overheat tripped |
| E117 | System pressure too high (>2.9 bar) |
| E118 | System pressure too low |
| E125 | Primary water circulation fault |
| E128 | Loss of flame during operation |
| E129 | Loss of flame during calibration |
| E130 | Flue thermostat sensor tripped (lockout) |
| E133 | Ignition fault |
| E135 | Internal error |
| E154 | Primary flow fault |
| E160 | Fan fault |
| E270 | Dry fire |
| E317 | Wrong power supply (HZ) |
| E321 | Hot water thermistor fault |
| E384 | Flame detected when gas valve off (false flame) |
| E385 | Low voltage (less than 195v) |
However, in some cases, getting a new boiler might be more cost-effective than getting your old boiler fixed. Some issues might be costly to fix. What is more, a new boiler will probably be more efficient and can help you save both money and energy. That is why getting a new boiler is a good investment in the long run.
Get a quote from Let’s Heat. We have a large range of products and our staff of Gas Safe engineers provides an excellent service that is both professional and reliable. In addition, we can help you get the boiler that best fits your house and heat requirements.
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FAQs
How long should a Potterton boiler last?
Boilers should last effectively for up to 15 years, and not be subjected to constant repairs. Add to this energy inefficiency and higher electricity bills, and you should know it’s time to find a boiler engineer to replace your boiler.
Is a Potterton boiler good?
Potterton boilers are known to be reliable. All of these models have a high energy efficiency rating, so you will see a reduction in your energy bills if you’re replacing an old, non-condensing unit.
How efficient is my Potterton boiler?
The Potterton Suprima 50L has a SAP seasonal efficiency rating of 78.1%. The Suprima 50L is a Non-Condensing Conventional boiler with a maximum power output of 14.7kw that uses Gas as its fuel source.