Mora Gas Boiler Error Codes are shown on our boilers to indicate that the product has an issue. There are different codes to indicate different categories of issues. The most common error codes for domestic products are explained below. If your boiler is displaying an error code which isn’t described below, please contact our dedicated service division, Customer Support, who will be able to help.
Mora Gas Boiler Error Code Solutions
Mora Boiler Error Code Error E1
It indicates that there is no ignition. Fault notification comes from the flame control sensor. This element takes into account the presence of a flame and suspends the operation of the Mohr gas boiler during low combustion of the main burner or in cases of a gas supply failure. Blocking occurs after 3 unsatisfactory inclusions. To resume the workflow, you must press and hold the Reset key.
Gas valve failure – The gas valve is controlled by an electronic board. This part is checked by measuring voltage and resistance. If it turns out that the values \u200b\u200bare different from the standard parameters, it is necessary to change the valve to a new one. There is no gas supply to the system – There is a valve in the gas distribution circuit that shuts off the inflow of gas fuel. Therefore, a malfunction when turning on the machine may be due to a closed valve. Weak contact or no pulse was detected from the ionization flame sensor.
The control board has a malfunction – When ignition has occurred without error, but the unit goes out immediately anyway, it is possible that the electronics cannot detect the flame. In this case, it should be tested. Problems during ignition. This code is issued when the ignition does not work or the burner flame is extinguished. It is required to check the connections between the ignition mechanism and the flame sensor, and also between the control board and the gas valve. The main factor in the separation of the flame of the burner may be a lack of thrust. Weak contact or no pulse was detected from the ionization flame sensor.
The control board has a malfunction – When ignition has occurred without error, but the unit goes out immediately anyway, it is possible that the electronics cannot detect the flame. In this case, it should be tested. Problems during ignition. This code is issued when the ignition does not work or the burner flame is extinguished. It is required to check the connections between the ignition mechanism and the flame sensor, and also between the control board and the gas valve.
The main factor in the separation of the flame of the burner may be a lack of thrust. Weak contact or no pulse was detected from the ionization flame sensor. The control board has a malfunction – When the ignition has occurred without error, but the unit goes out immediately anyway, it is possible that the electronics cannot detect the flame. In this case, it should be tested. Problems during ignition. This code is issued when the ignition does not work or the burner flame is extinguished. It is required to check the connections between the ignition mechanism and the flame sensor, and also between the control board and the gas valve.
The main factor in the separation of the flame of the burner may be a lack of thrust. the electronics cannot detect the flame. In this case, it should be tested. Problems during ignition. This code is issued when the ignition does not work or the burner flame is extinguished. It is required to check the connections between the ignition mechanism and the flame sensor, and also between the control board and the gas valve.
The main factor in the separation of the flame of the burner may be a lack of thrust. the electronics cannot detect the flame. In this case, it should be tested. Problems during ignition. This code is issued when the ignition does not work or the burner flame is extinguished. It is required to check the connections between the ignition mechanism and the flame sensor, and also between the control board and the gas valve. The main factor in the separation of the flame of the burner may be a lack of thrust.
Mora Boiler Error Code E5
Mohr’s boiler is overheated. The device is blocked. The overheating safety thermostat is activated – The temperature sensor and the overheating thermostat are in most cases located on the outlet pipe of the main heat exchanger. The main task of the thermostat is to ensure the safety of the device from high temperatures. An accident most often occurs due to problems in the thermostat, temperature sensor, and in addition, when the operation of the main circulation circuit is difficult.
Faulty temperature sensor – The control board receives an incorrect signal or poor contact between the sensor and the electronic board. Faulty superheat thermostat – When it is OK, although there is an actual liquid superheat, there seems to be a problem with the circulation of the coolant in the main circuit. The main heat exchanger or the filter element of the heating circuit is clogged (low circulation level means high heating of the coolant). There is a malfunction with the circulation pump or there is an air blockage in the heating system.
Mora Boiler Error Code E9
Indicates low pressure in the system. The main sources preceding this malfunction: a decrease in the pressure of the coolant in the heating system. Poor contact between the minimum pressure sensor and the electronic board. Pressostat malfunction. The first step is to look at the pressure gauge. Most often, the problem is eliminated with the use of a make-up valve, which is designed to add coolant to the system. In the event that a failure occurs again, it is possible that there is a coolant leak. The hydraulic pump, main heat exchanger, excess pressure relief valve, worn gaskets, make-up valve and other parts can leak. A leak can be found by visual inspection of the hydraulic components.
Mora Boiler Error Code E2
There is no traction. For the correct and safe operation of the Mora boiler, it is necessary to provide draft for the removal of combustion products so that they do not enter the room. The outlet of gases is controlled by automatics, and if certain problems occur, the thrust sensor-relay will work, and the gas appliance will be blocked. The main reasons due to which there may be a lack of traction: small-sized diameter of the flue duct, inaccuracy during installation, blockage, icing of the inner wall.
The narrowing of the diameter of the outlet channel can cause a lack of traction. Exceeding the maximum length of the chimney It is recommended that you carefully read the instruction manual for the gas boiler and follow all the necessary requirements. Too much horizontal flue pipe can cause a lack of draft. Damage to the draft sensor – When a vacuum is created in the supply pipe, a characteristic click can be heard.
The contact of the pressure switch and the control board was broken, condensate in the tubes, as well as incorrect fastening of the tubes with the pneumatic relay. Fan defective – The fan impeller is clogged. Lack of sufficient lubrication of the fan shaft, which is why it cannot develop the required speed. Lost contact between control board and fan. why he can not develop the necessary speed. Lost contact between control board and fan. why he can not develop the necessary speed. Lost contact between control board and fan.
Mora Boiler Error Code E4
Problems with determining the temperature of the DHW sensor. This indicates a malfunction of the temperature sensor in the hot water circuit or the permissible temperature has been exceeded. Probable causes influencing the formation of this malfunction: the hot water temperature sensor is broken. The contact of the control board with the temperature sensor on the DHW is broken. Control board burned out. When the hot water temperature sensor is operational and firmly connected to the electronic control board, although at this moment the boiler displays an error, then the electronic control board may not be operational.
Mora Boiler Error Code E3
The temperature sensor in the heating circuit does not function correctly. This code indicates that the heating circuit temperature sensor is damaged or the temperature required for operation has risen. An open in the temperature sensor circuit in the heating circuit – Such a malfunction occurs if the connection between the temperature sensor and the electronic board is broken, or the temperature is below the nominal one. After five seconds have elapsed following the detection of a malfunction, the Mora boiler will restore trouble-free operation, in case the malfunction occurred spontaneously.
It is recommended to make sure that there is no moisture on the thermal sensor connector and the controller connector – If there is no moisture, it is recommended to change the sensor. There is a short circuit of the heating circuit temperature sensor – This situation most often occurs after a short circuit of the temperature sensor contacts or the temperature of the coolant is higher than recommended. First you need to measure the resistance of the temperature sensor. If the resistance characteristics differ from the standard, it is necessary to change the sensor. When installing a working sensor does not bring the desired result, repair the board.