BoilerFaultCodes.com

Potterton Promax 15/2 HE Plus Fault Codes

Regular Natural Gas 15 kW 2008-2015 Discontinued
GC Number: 41-591-96

Replaced by: Promax Ultra

This boiler uses LED flash patterns

Count the flashes in one repeating group before the pause. That number is your fault code. Do not reset until you have noted it. How to read fault codes →

Most common fault codes

FAN LOCKOUT
Your boiler has stopped working because the internal fan, which safely exhausts gases, is unable to start or spin at the correct speed.
Gas Safe engineer required · £280-£450
Red LED: Flash, Green LED 1: Flash, Green LED 2: On
Your boiler has detected an issue with the ventilation fan or airflow, causing the system to shut down for safety.
Gas Safe engineer required · £180-350
Red LED: Flash, Green LED 1: Off, Green LED 2: Flash
Your boiler is not receiving enough electrical power from your home's supply to operate safely.
Gas Safe engineer required · £100-250

All 13 fault codes

Code Severity Plain English
FAN LOCKOUT High Your boiler has stopped working because the internal fan, which safely exhausts gases, is unable to start or spin at the correct speed.
Red LED: Flash, Green LED 1: Flash, Green LED 2: On High Your boiler has detected an issue with the ventilation fan or airflow, causing the system to shut down for safety.
Red LED: Flash, Green LED 1: Off, Green LED 2: Flash High Your boiler is not receiving enough electrical power from your home's supply to operate safely.
Red LED: Flash, Green LED 1: Off, Green LED 2: On High Your boiler has switched itself off because it has reached an unsafe temperature and needs to cool down and be reset.
Red LED: Flash, Green LED 1: On, Green LED 2: Flash High Your boiler's main internal computer has developed a serious electronic fault and can no longer control the heating system safely.
Red LED: Flash, Green LED 1: On, Green LED 2: On High Your boiler's internal computer has suffered an electrical failure and is no longer able to control the heating process.
Red LED: On, Green LED 1: Flash, Green LED 2: Flash High Your boiler has sensed that there isn't enough water circulating inside it while the burner is on, causing it to overheat quickly.
Red LED: On, Green LED 1: Flash, Green LED 2: On High Your boiler has detected a sensor error relating to how it measures water temperature, causing it to stop running for safety.
Red LED: On, Green LED 1: Off, Green LED 2: Flash Emergency Your boiler has detected that the electrical wiring coming into the unit is connected backwards, which is a safety risk that prevents it from starting up.
Red LED: On, Green LED 1: Off, Green LED 2: On High Your boiler has failed to ignite and has locked itself out as a safety precaution.
Red LED: On, Green LED 1: On, Green LED 2: Flash High Your boiler’s internal control system has stopped working and will likely prevent the boiler from starting at all.
Red LED: On, Green LED 1: On, Green LED 2: On High Your boiler has stopped working because of an internal communication error between its electronic control boards.
THERMISTOR High Your boiler has detected a faulty temperature sensor which means it can no longer accurately monitor how hot the water is getting.

Potterton Promax 15/2 HE Plus is discontinued — time for a new one?

Parts for discontinued models can be hard to find and expensive. A new A-rated boiler could save you money on both repairs and energy bills.

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