When an AC unit stops cooling, it is usually due to a lack of airflow or a mechanical failure. Here are the most common culprits for this specific model: 1. Dirty Air Filter
If the metal fins are covered in dust, pollen, or dirt, the unit can't "dump" the heat outside. hsp06f1s4 hot
If the unit is running perfectly but the room is still hot, it might be undersized. When an AC unit stops cooling, it is