BoilerFaultCodes.com

Main Eco Compact Fault Codes

CombiSystem Natural Gas 25-30 kW 2019-present
GC Numbers: 47-225-3247-225-3341-225-2541-225-26

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Most common fault codes

E09
Your boiler has lost its electrical connection to the gas supply unit, meaning it cannot ignite to provide heating or hot water.
Gas Safe engineer required · £120-£350
E15v
Your boiler has detected an internal issue with the gas control system and has shut down as a safety precaution.
Gas Safe engineer required · £180-350
E20
Your boiler has detected a fault with the internal sensor that monitors the temperature of your central heating water, causing the system to stop working as a safety precaution.
Gas Safe engineer required · £90-£160

All 19 fault codes

Code Severity Plain English
E09 High Your boiler has lost its electrical connection to the gas supply unit, meaning it cannot ignite to provide heating or hot water.
E15v High Your boiler has detected an internal issue with the gas control system and has shut down as a safety precaution.
E20 High Your boiler has detected a fault with the internal sensor that monitors the temperature of your central heating water, causing the system to stop working as a safety precaution.
E28 High Your boiler has detected a problem with the sensor that monitors the temperature of the exhaust gases, causing the system to shut down for safety.
E40 High Your boiler has detected a problem with the sensor that monitors the temperature of the water returning from your radiators.
E83 High Your boiler's internal computer parts are having trouble talking to each other, which means the system has stopped working for safety.
E109 High Your boiler is struggling to move water around the system before it starts the heating process, which is often caused by a blockage or a pump issue.
E110 High Your boiler has switched itself off because it has reached an unsafe temperature, usually due to a lack of water flow or a circulation problem.
E118 High Your boiler has stopped working because the water pressure in the system has dropped too low and needs topping up.
E125 High Your boiler is struggling to move hot water around the system, which is usually caused by a blockage or a pump issue that is preventing the unit from cooling itself down.
E128 High Your boiler has lost its flame while running, which means it has safely shut down to prevent issues.
E130 High Your boiler has shut down because a sensor has detected that the exhaust gases are becoming too hot, which is a safety feature to prevent damage.
E133 High Your boiler has failed to light because it is not receiving enough gas or cannot detect the flame used to heat your water.
E135 High Your boiler has lost its gas supply, meaning it cannot light the flame to provide heating or hot water.
E154 High Your boiler has noticed that water is not circulating correctly or the temperature sensors are giving conflicting readings.
E160 High Your boiler has stopped working because the internal fan, which safely exhausts gases, is not spinning at the correct speed or has lost power.
E270 High Your boiler has detected that water is not moving through the system correctly, causing it to overheat quickly.
E321 Medium Your boiler has detected a problem with the sensor that monitors the temperature of your hot water, meaning your taps may not get as hot as they should or stay consistent.
E384 High Your boiler thinks a flame is present even when it should be off, causing it to shut down for safety.

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