46 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.
Replaced by: Potterton Titanium
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 →
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 |
|---|---|---|
| 47-393-12 | Performa 24i HE | 2004–2008 |
Tap any card for details
Your boiler has detected that water is not circulating properly through the system, so it has safely shut down to prevent damage.
Your boiler is failing to detect the water flowing through it, which prevents it from firing up to provide your heating or hot water.
Your boiler has detected a fault and needs to be restarted, but if the light continues to flash, there is an underlying issue that prevents it from working reliably.
Your boiler has detected an issue with the internal ventilation system that prevents it from safely igniting, so it has shut down to protect itself.
Your boiler is failing to detect the airflow needed for safe operation, so it has shut down to prevent the burner from starting incorrectly.
Your boiler is trying to start but keeps cutting out immediately after ignition, which means it cannot sustain a flame to keep your home warm.
Your boiler has detected an internal error and has temporarily stopped working to protect itself, meaning you likely have no heating or hot water until it is reset or repaired.
Your boiler is struggling to circulate water, which means it has safely shut down to prevent overheating because it cannot provide heat or hot water.
Your boiler has detected that the internal fan is struggling to spin fast enough to safely clear fumes, so it has stopped working as a precaution.
Your boiler is failing to light because it cannot confirm that the internal fan is moving air through the system safely.
Your boiler is failing to ignite because it cannot successfully start the flame needed to provide your heating and hot water.
Your boiler is attempting to light but is cutting out because it cannot detect a stable flame, meaning it currently cannot provide heating or hot water.
Your boiler has automatically turned itself off because it has become dangerously hot and needs cooling down before it can run again safely.
Your boiler has lost the electrical connection to the valve that controls the flow of gas, meaning it cannot safely start up.
Your boiler has stopped providing hot water because it is having trouble reading the temperature of the water inside the unit.
Your boiler is unable to detect or control the flow of gas necessary to ignite the flame, meaning it cannot produce heating or hot water.
Your boiler has stopped working because it can no longer accurately measure the temperature of the water being sent to your radiators.
Your boiler has stopped working because it cannot light its burner properly, which is often caused by a blockage in the pipe that drains away waste water.
Your boiler has detected that it is getting too hot and has automatically shut itself down to prevent damage.
Your boiler is currently unable to safely remove waste gases, so it has shut itself down to prevent any risk to your home.
Your boiler has detected that water is either not moving around the system correctly or that the pressure of the water inside the unit is too low to run safely.
Your boiler has detected an issue with the sensor that monitors the temperature of the exhaust gases, causing it to stop working for your safety.
Your boiler has stopped working because it is unable to accurately measure the temperature of the water used for your radiators.
Your boiler has lost the ability to measure the temperature of the water returning to it, so it has safely shut itself down to prevent damage.
Your boiler is failing to detect that water is circulating properly before it attempts to light the burner.
Your boiler has detected that it is getting too hot and has automatically shut itself down to prevent damage.
Your boiler has detected that there is too much water pressure in your heating system, which can put unnecessary strain on its internal components.
Your boiler has stopped working because the water pressure inside the heating system has dropped too low.
Your boiler is struggling to pump water around your heating system which is preventing it from staying lit.
Your boiler has stopped working because it cannot light the flame required to produce heat.
Your boiler has detected that the temperature in the exhaust flue is too high, causing it to shut down for safety reasons.
Your boiler has stopped working because it cannot light its internal flame or is not receiving the gas supply it needs to run.
Your boiler is failing to ignite because it cannot detect that gas is flowing into the burner after attempting to start.
Your boiler has detected that it cannot receive or burn gas properly, which has triggered a safety shutdown to prevent dangerous operation.
Your boiler is struggling to compare the temperatures of water flowing in and out of the system, so it has shut itself down as a precaution to prevent overheating.
Your boiler has stopped working because it cannot detect that the internal fan, which is essential for safely venting exhaust gases, is spinning correctly.
Your boiler has detected that water is not flowing through it properly, which could mean the system is empty or the pump is struggling to push water around.
Your boiler has lost the ability to measure the temperature of the water being heated for your taps, so it has shut down to prevent overheating.
Your boiler has detected a flame when it should be switched off, which has caused it to lock itself down for your safety.
Your boiler is struggling to breathe because it cannot vent exhaust gases properly outside, so it has safely shut itself down to prevent a carbon monoxide hazard.
Your boiler has stopped working because the water pressure inside the system is too low to operate safely.
Your boiler has detected air inside the gas pipe, which is preventing it from lighting safely.
Your boiler is failing to light because it cannot detect a stable flame or is not receiving the gas supply it needs to stay running.
Your boiler is struggling to start because it cannot successfully ignite the gas flame or keep it running reliably.
Your boiler's main control computer is experiencing a system error, meaning it can no longer safely operate your heating or hot water.
Your boiler has detected that it is getting too hot and has automatically switched itself off to prevent any damage or safety hazards.
Not faults — these are normal operating states. Tap to expand.
BoilerFaultCodes