The E3 fault code displayed on a Midea rice cooker usually indicates a problem with the temperature sensor, which may cause the rice cooker to not work properly. Here are some possible repair steps, but please note that care is required when performing repairs, and if you are new to appliance repair, it is best to consult a professional repairman or contact the manufacturer's customer support.

1. Power outage and disconnect: Before making any repairs, be sure to disconnect the power supply and unplug the power plug to ensure your safety.

2. Check the temperature sensor: The temperature sensor may have connection problems or malfunctions. You can check whether the sensor's wire connection is tight and reconnect it if it is loose. If the sensor itself is damaged, it may need to be replaced with a new one.

3. Check the control circuit board: The E3 error may also be related to the control circuit board. Check that the components on the circuit board are intact and there are no obvious burns or damage. If problems are found, the circuit board may need to be replaced.

4. Reset the rice cooker: Sometimes, resetting the rice cooker can solve a temporary problem. You can try unplugging the rice cooker, waiting for a while, and then plugging it in again.

5. Contact customer support: If you are not sure how to repair or the above steps cannot solve the problem, it is recommended that you contact the Midea rice cooker customer support department or seek professional repair help. The manufacturer's customer support team can usually provide guidance on how to deal with E3 errors or arrange for repairs.

Remember that appliance repair requires care, and if you are new to appliance repair, it is best to seek professional help to avoid further damage to your equipment or safety risks. Before any repairs, make sure the rice cooker is de-energized and disconnected from the power source.