Reasons Why Your Air Conditioner Isn't Cooling and How to Fix It

Selasa 25-11-2025,18:01 WIB
Reporter : Putri Nurhidayati
Editor : Purnama Sakti

5. Room Condition

Another factor that can cause an AC unit to not cool is the condition of the room. More specifically, a room that experiences a temperature increase easily. For example, a room can easily overheat due to daily exposure to direct sunlight.

One possible cause is if the windows are large. Furthermore, the walls are made of a mixture of cement and sand, which easily absorb heat.

The cooling effect of the AC unit won't feel optimal because the room itself is always hot.

If the room has large windows that allow sunlight to dominate the room's temperature, try the following tips.

You can install special curtains to block out the heat of the sun.

This way, the room can remain bright thanks to natural light, but the temperature will also remain cool because the AC can produce maximum cooling air.

Another way to address an AC unit that isn't cooling is to paint the walls in colors that create a cool impression, such as green, duck egg blue, ice blue, white, gray, and light purple.

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6. The AC unit isn't the right size for the room

If neither the indoor nor outdoor units are working properly, this could be the cause of the AC not cooling.

If the AC unit is small in capacity but the room is quite large, the cool temperature won't be felt throughout the room.

If this is the reason the AC isn't cooling in your home, the solution is to install an AC unit with the right capacity for the room's size.

For a room measuring 3 meters x 3 meters, a 1/2 HP AC unit is ideal. For a room measuring 3 meters x 6 meters, a 1 HP AC unit is recommended, while a room measuring 6 meters x 6 meters requires a 2 HP AC unit.

7. Doors or windows are frequently open

The cause of an AC not cooling isn't always the AC unit or motor. It could be that the AC suddenly stops cooling because the windows or doors in the room or house are open too often.

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