BoilerFaultCodes.com

Ariston Ariston Error Codes Fault Codes

Natural Gas

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Most common fault codes

1p1
Your boiler is struggling to move water around correctly, often caused by a lack of pressure or air trapped in the system.
May be DIY safe · £100-280
1p2
Your boiler is struggling to move water around the system properly, which is causing it to overheat and shut down for safety.
May be DIY safe · £120-£350
1p3
Your boiler has detected that water is slowly being lost from the system, preventing it from heating up safely.
May be DIY safe · £80-250

All 48 fault codes

Code Severity Plain English
1p1 High Your boiler is struggling to move water around correctly, often caused by a lack of pressure or air trapped in the system.
1p2 High Your boiler is struggling to move water around the system properly, which is causing it to overheat and shut down for safety.
1p3 High Your boiler has detected that water is slowly being lost from the system, preventing it from heating up safely.
1p4 High Your boiler has detected that water is circulting too slowly or there is not enough water pressure to run safely.
3P9 Low Your boiler is notifying you that a scheduled service is due to ensure it continues running safely and efficiently.
5P1 High Your boiler is struggling to light its flame or detected a failed start, which may be due to a temporary issue with the gas flow or ignition.
5P2 High Your boiler is struggling to keep a flame lit after it has started, often due to an issue with the gas supply or a part that monitors the fire.
5P3 High Your boiler has lost its flame suddenly while it was running, causing it to stop for safety.
101 High Your boiler has shut down because it has detected that the water inside is getting too hot, known as overheating.
102 Medium Your boiler is having trouble communicating with its internal sensors or parts, likely due to a minor electrical hiccup or connection issue.
103 High Your boiler has detected that water is not circulating properly through the system, often caused by a lack of water pressure or a blockage.
104 High Your boiler has detected that water is not circulating fast enough through the system, usually due to a lack of water pressure or a blockage.
105 High Your boiler has likely stopped working because there is an issue with water not circulating properly, often caused by trapped air or a blockage.
106 High Your boiler has detected that there is not enough water circulating through the system or there is an air lock preventing flow.
107 High Your boiler has stopped working because the water isn't circulating properly, likely due to a blockage, air in the system, or a mechanical failure.
108 High Your boiler has lost water pressure and needs to be topped up to work properly.
109 High Your boiler has detected that the water inside is not circulating properly or there is air trapped in the system, causing it to stop for safety.
110 High Your boiler has likely overheated or a safety sensor has detected that it is running too hot, causing the system to shut down for safety.
112 High Your boiler has detected an issue with the wiring or the sensors that monitor the water temperature returning to the unit.
114 Low Your boiler has detected that an external outdoor temperature sensor is not sending a clear signal correctly.
116 High Your boiler has detected that the floor thermostat or external safety circuit has been triggered, often to protect your underfloor heating system from overheating.
118 High Your boiler has lost water pressure, which means there isn't enough water in the system to keep it running safely.
202 Medium Your boiler has lost communication with the external temperature sensor, which helps it adjust your heating based on the weather outside.
204 High Your boiler has lost communication with the main control board, meaning it cannot currently function or heat your home.
205 High Your boiler has lost its connection with the internal sensor that monitors the temperature of the water returning to the unit.
207 High Your boiler has detected that the circulating water is moving too slowly or there is an air pocket trapped within the system pipes.
208 Low Your boiler has detected that the solar collector probe is in an open circuit, meaning it cannot properly monitor the temperature of your solar heating system if you have one connected.
301 High Your boiler has detected a software or communication error on the main control board, which is preventing the system from operating correctly.
302 High Your boiler has lost communication between its internal control boards, meaning it cannot send or receive the signals needed to operate safely.
303 High Your boiler's main control board has detected an internal computer error and can no longer safely operate.
304 Low Your boiler has gone into a temporary lockout because it has been reset too many times in a short period.
305 High Your boiler's electronic control board has encountered an internal software error and can no longer process instructions correctly.
306 High Your boiler’s main control board has detected an internal electronic fault and cannot operate for safety reasons.
307 High Your boiler has detected an internal communication error, meaning the main control board is having trouble processing information correctly.
407 High Your boiler has detected a problem with a temperature sensor, meaning it cannot accurately monitor the heat levels needed to warm your home.
501 High Your boiler has failed to ignite, which means it cannot light the gas to provide heating or hot water.
502 High Your boiler has detected a flame even though it hasn't signaled for the burner to light, which is a safety conflict that prevents it from running.
504 High Your boiler has lost its flame during operation, meaning it can no longer heat your water or home safely.
604 High Your boiler's fan is spinning too slowly to safely clear waste gases, which has caused the system to shut down for safety.
610 High Your boiler has been locked out after the heat safety device tripped because it detected the system was getting too hot.
612 High Your boiler's fan is not reaching the required speed, which means the system cannot safely clear exhaust gases and will not fire up.
701 High Your boiler has detected a technical fault with its internal temperature sensors, which is preventing it from heating your home or water safely.
702 Medium Your boiler has lost communication with its external heating controls, meaning it is struggling to understand when it should be turning on or off.
703 High Your boiler has detected a communication problem between its main internal control board and the display interface.
704 High Your boiler has stopped working because of an internal communication failure between the main control board and the display panel.
705 High Your boiler has lost communication with the internal temperature sensor for the heating system, meaning it cannot monitor how hot the water is getting.
706 High Your boiler has lost connection with its internal display or control screen, meaning it cannot properly communicate settings.
707 High Your boiler has detected an internal communication failure between its electronic control boards.

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