What to do if the heating performance of the Mijia Air Conditioner Pro Eco A+++ 12K is poor?

If the heating performance of the Mijia Air Conditioner Pro Eco A+++ 12K is poor, please follow these steps:
1. Please make sure the air conditioner model is suitable for the room, and avoid frequently opening or closing doors and windows;
2. Clean the air filter regularly to prevent blockage, and check that the air inlet is not obstructed. Make sure the airflow from the outlet is strong;
3. Set the fan speed to level 5 or higher (high speed), and adjust the air deflector to blow downward;
4. Keep the room sealed by closing all doors and windows. Be aware that heating efficiency will significantly decrease when the outdoor temperature falls below -7℃;
5. Switch to Heating Mode and set the temperature higher than the current room temperature (e.g., 31℃). Let it run for at least 5 minutes to observe changes;
6. Check if the defrosting function has been activated. The air conditioner pauses heating for about 10 minutes every 30 to 60 minutes during defrosting;
7. If the air conditioner fails to operate normally or if the issue persists, it is recommended to request after-sales service for further inspection.