- Error: E3
- Description: Error of the indoor heat exchanger midpoint temperature sensor.
- Possible Causes: Temperature sensor not properly connected or malfunctioning, damaged main PCB.
- Solution: Check the temperature sensor connection and measure its resistance. If the resistance is too low, the sensor has short-circuited. If the problem persists, replace the main PCB.
Steps to Fix E3 Error in Midea Air Conditioner
If your Midea air conditioner displays the E3 error, there may be an issue with the indoor heat exchanger midpoint temperature sensor. Here’s how to troubleshoot and resolve this problem.
Step 1: Verify the temperature sensor connection
The first thing you should do is check that the temperature sensor is properly connected. Follow these steps:
- Turn off the air conditioner and unplug it from the power source.
- Open the indoor unit and locate the indoor heat exchanger midpoint temperature sensor.
- Verify that the sensor is correctly connected to the corresponding connection port on the main PCB of the indoor unit.
- If the sensor is not properly connected, reconnect it and turn on the air conditioner to see if the problem is resolved.
Step 2: Measure the resistance of the temperature sensor
If the problem persists, it’s possible that the temperature sensor is malfunctioning. To verify this, you need to measure its resistance. Follow these steps:
- Turn off the air conditioner and unplug it from the power source.
- Open the indoor unit and locate the indoor heat exchanger midpoint temperature sensor.
- Disconnect the temperature sensor from the main PCB of the indoor unit.
- Using a multimeter, measure the resistance of the temperature sensor. If the resistance is too low, the sensor has short-circuited and needs to be replaced.
Step 3: Check the main PCB of the indoor unit
If the connection is loose or not properly connected, make sure to connect it correctly. If the connection is fine, measure the resistance of the indoor heat exchanger midpoint temperature sensor. If the resistance is too low, the sensor has short-circuited and needs to be replaced. If the sensor is functioning correctly, but the E3 error persists, it’s possible that the main PCB is damaged and needs to be replaced.
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