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Kevin SpencerAug 18, 2025
Why is my Heinner HAC-12OWF-BK Air Conditioner not cooling properly?
- JjeremysmithAug 18, 2025
Several factors can cause poor cooling performance. The temperature setting may be higher than the room temperature, so lower the temperature setting. The heat exchanger or air filter could be dirty, so clean them. The air inlet or outlet might be blocked; turn off the unit, remove the obstruction, and turn it back on. Ensure all doors and windows are closed to prevent heat entry. Reduce heat sources in the room, such as computers or electronics. Check for refrigerant leaks and reseal if necessary, and top off refrigerant. Also, ensure the SILENCE function is deactivated.