Error E4 in Haier washing machine

If your Haier washing machine shows error E4, you should pay special attention to the operation of the machine until the code is displayed on the display. To do this, turn off the washing machine and restart the equipment (except for cases when you feel an electric shock when you touch the body of the machine). If the fault code appears a few minutes after starting, it means there is a problem with water heating.

Let's do the calculations

What to do when you find a code on the screen? One of the reasons for the error E4 – failure of the heating element of the washing machine. You can diagnose the heating element yourself by ringing it with a multimeter.

The tester will determine the resistance produced by the heating element. To calculate the nominal value of the parameter specifically for your washing machine model, you will have to remember the basics of physics. Resistance in Ohms is determined by the formula: R= U²/P, where:

• U – voltage in the electrical network (in an apartment and house, the parameter value is usually 220 Volts);
• P – power of the heating element. You can see this value in the instructions. If the information is not specified in the manual, the World Wide Web will help you find the power value. On the Internet you can collect information about a specific model of machine.

If the resistance you calculated coincides with the value measured with a multimeter, then the heating element is working.

How is counting done in practice? Let's say the power of the heating element is 1800 W. Then the resistance will be 220*220/1800=26.89 Ohms. The breakdown of the heating element can be stated if the tester showed a mark significantly higher or lower than the calculated value.

We call the heating element

So, do-it-yourself repair of a Haier machine that displays an E4 error should begin by checking the heating element. Before carrying out work, be sure to turn off the power to the washing machine. Next, remove the back wall of the equipment housing and find the place where the heating element is attached. Then carefully disconnect the power supply from the element.

Turn on the resistance detection mode on the multimeter, set the selector to 200 ohms. Connect the tester probes one by one to the terminals of the heating element. The working heating element will transmit to the multimeter a value close to the calculated number. If the tester displays one or zero, it means that the heater needs to be replaced; it cannot be repaired.

Next you need to check the heater for breakdown. Inside the heating element tubes, between their walls and the internal spiral, there is a dielectric, which sometimes begins to leak onto the body of the washing machine. This situation is extremely dangerous for the user, as it leads to electric shock to the washing machine.

To further diagnose the heater, the multimeter is set to buzzer mode. If you close the probes of the device, a light will immediately light up on the screen and the tester will start beeping. One probe leans against the heating element terminal, the second - against the element body. If the multimeter is silent, everything is fine; the “beeping” of the tester will indicate the need to replace the heater.

Testing the temperature sensor

The reason for displaying error E4 is not always a broken heating element. The fault code may indicate problems with the temperature sensor. The thermostat is located directly on the heater. To eliminate the error, you will also have to check the thermistor. For this:

• remove the back cover of the SMA housing;
• carefully disconnect the wiring from the sensor;
• slightly loosen the bolt holding the heating element;
• remove the thermostat.

Checking the temperature sensor is also carried out using a multimeter.

The tester switches to resistance measurement mode. The multimeter probes are connected to the thermostat contacts. Next, the sensor is lowered into a container of hot water.

At a water temperature of 20 °C and a working thermistor, the tester will give a value of about 6000 Ohms. After immersing the temperature sensor in water, monitor the readings of the multimeter. The thermostat is operational if the resistance is below the standard value. When the fluid temperature is approximately 50 °C, the resistance value should be approximately 1350 ohms.

If a breakdown of the temperature measurement sensor is detected, it will have to be replaced. The thermostat cannot be repaired. Assembling the automatic washing machine occurs in the reverse order.

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