BoilerFaultCodes.com

Potterton Promax System HE Plus Fault Codes

System Natural Gas 12-32 kW 2006-2012 Discontinued
GC Numbers: 41-591-9141-591-9241-591-9341-591-9441-591-95

Replaced by: Promax System High Efficiency

The fault code is already on your display

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

Most common fault codes

E20
Your boiler has lost its connection to the sensor that monitors the temperature of the water in your heating system, causing the boiler to stop working.
Gas Safe engineer required · £90-160
E28
Your boiler has detected a problem with the sensor that monitors the temperature of the exhaust gases, causing it to stop running for safety.
Gas Safe engineer required · £120-£210
E110
Your boiler has shut down because it has detected an unsafe increase in temperature and has triggered a safety cut-out to prevent damage.
May be DIY safe · £90-250

All 11 fault codes

Code Severity Plain English
E20 High Your boiler has lost its connection to the sensor that monitors the temperature of the water in your heating system, causing the boiler to stop working.
E28 High Your boiler has detected a problem with the sensor that monitors the temperature of the exhaust gases, causing it to stop running for safety.
E50 Medium Your boiler's temperature sensor for hot water has developed a fault, meaning the system may struggle to heat your water to the correct temperature.
E110 High Your boiler has shut down because it has detected an unsafe increase in temperature and has triggered a safety cut-out to prevent damage.
E119 High Your boiler has detected that the water pressure is too low for it to run safely and has shut down as a precaution.
E125 High Your boiler has stopped working because water is not moving through the system correctly, which could be due to a blockage or a pump issue.
E130 High Your boiler has sensed that the exhaust gases are getting too hot and has shut down as a safety precaution to prevent damage.
E133 High Your boiler has failed to light because it either cannot get enough gas or cannot detect a flame once ignited.
E160 High Your boiler has stopped working because the internal fan, which safely clears exhaust gases, isn't spinning at the correct speed.
E193 High Your boiler has sensed that water is not circulating properly before it starts the heating process, which is usually caused by an air lock or a blockage.
SF Low Your boiler is currently running in a special service mode used by engineers to test its performance, and it is not actually reporting a fault.

Potterton Promax System 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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