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Remeha Boiler Fault Codes and Errors
Remeha is one of the leading boiler manufacturers in Europe that cater to both domestic and commercial buyers. With decades of experience and the financial backing of the giant Baxi Heating, Remeha has been able to develop some of the most reliable boilers in the market.
However, despite the extensive research and revolutionary designs, Remeha boilers are yet to achieve fault-proof status. As such, they too tend to develop issues from time to time that results in error codes being flashed on the display panel.
In this guide, we will explain the meaning and causes of the different fault codes that your Remeha boiler may display. We will also cover the possible fixes that could resolve the said error codes.
| Error
Code |
Description/ Possible cause | Fix |
| E0 | Flow or return or boiler temperature sensor fault. This is usually caused by the said sensor being damaged or having loose or having broken electrical connections. It might also result from the presence of a short circuit in the sensors. | Check and ensure that all the electrical connections to the sensors are in good shape. You can also use a multimeter to check the resistance of the wires and the connections. |
| E1 | The flow temperature in the boiler system exceeds the set maximum temperature. This error is usually brought about by insufficient water in the system, excess air in the system, and obstruction of through flow. | Repressurise the boiler, ensure that the pump is working correctly, bleed the system and ensure that the boiler temperature sensor is working correctly. |
| E2 | The boiler return temperature is higher than the flow temperature. The issue is caused by insufficient water in the system or obstructed flow or excess air, sensor wiring issues, or deviation in the flow/return sensor. | Repressurise the boiler, ensure that the pump is working correctly, bleed the system and ensure that the boiler temperature sensor is working correctly. |
| E3 | There is either a control unit error or an earth fault. This error is usually attributed to an incorrectly earthed mains supply or a faulty control unit. | Ensure the power supply from the switched spur is adequately earthed. If the issue springs from a faulty control unit, you should call a certified heating engineer. |
| E4 | There have been more than 5 start attempts, yet no flame has formed. This can result from the absence of an ignition spark, or a flame, or the present flame having insufficient ionization power. | Ensure the flame detection electrode is properly working. Next, check your gas supply line and confirm that there is gas and that it is at sufficient pressure. After that, check that the gas valve is open and that the air supply or flue is not obstructed. Lastly, clean the ignition electrode with sandpaper to remove any oxide film present. |
| E5 | There has been no ionization, or an ionization failure has been registered more than 5 times during one heat demand. CO2 issues usually cause this | Check that there is no recirculation of flue gases. Also, ensure that the CO2 adjustment in the boiler is made correctly. |
| E6 | Flame is detected even when the boiler is off, usually caused by a faulty PCB unit. | Replace the PCB unit, or hire a heating engineer to do the job |
| E7 | There is no water in the system, or the pump is not working. This is usually caused by insufficient water in the boiler system, wrong pump wiring, or unwanted air in the system. | Refill the boiler system and ensure that the pump is working correctly |
| E8 | The fan is faulty, meaning it won’t run or it won’t stop running | Check the fan for any wiring issues and remove any debris that may hinder its operation. Also, ensure that there is no excess chimney draught |
| E9 | There is no water in the boiler system, or the pump stopped working. This issue is brought about by low water pressure or a failed water pressure switch. | Refill the boiler system if water pressure is too low and ensure that the pump is working correctly. Once done, reset the boiler, and if the issue doesn’t clear, contact a heating engineer. |
| E10 | There is no through way during the venting cycle. It is usually caused by wrong pump wiring or insufficient water in the system, or the presence of excess air in the system. | Ensure the boiler is at the recommended pressure level. Next, ensure that the pump is working correctly and bleed any air present in the system. |
| E11 | The airbox temperature is too high due to air leakage from the heat exchanger to the airbox. | Contact a professional heating engineer |
| E13 | A heat exchanger fault or insufficient water in the system prompted the heat exchanger fuse protection feature to be activated. | Ensure the heat exchanger and the fuse are correctly wired. Also, check that the pump is working correctly |
| E43 | Parameter limits error resulting from automation settings | |
| E44 | A parameter check due to automation settings | |
| E45 | Default parameters due to a faulty boiler control unit |