How To Fix Haier Air Conditioner Error Code E9 (The Common Causes And Troubleshoot Of Error Code E9)

How To Fix Haier Air Conditioner Error Code E9 (The Common Causes And Troubleshoot Of Error Code E9). In this video tutorial I will show you how to fix Haier air conditioner error code E9.

Error code E9 in Haier air conditioners is a “High work-intense protection” code. The code occurs when the heat exchange thermistor detects over 65◦C twice within thirty minutes while the AC is in "Heating Mode."
Common causes of the error code include:
• A faulty electronic expansion valve.
• Dirt-clogged heat exchanger.
• Faulty heat-exchange sensors.

Now, let’s look at a systematic procedure to fix the issue.
Restart the air conditioner system by power cycling it and confirm that the wind temperature is below 65◦C.
If the error occurs after the AC system has run for some time:
• Check the room temperature and pipe temperature sensors to see if they are faulty. Repair the sensors or replace them if necessary.
• If the sensors are not faulty, replace the temperature monitoring circuit on the indoor unit.

Assess how the indoor unit blows. If it does so poorly:
• Clean the filters.
• Check if the fan operates properly and repair it if necessary.

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