10+ Common causes of air conditioning not cooling and how to fix it

Air conditioner not cool is one of the unexpected situations you may encounter during the use of the air conditioner. However, if you encounter this situation, you should not be too worried, follow the following article to know the causes and the most accurate way to fix it!

1. The filter mesh of the outdoor unit and indoor unit is dirty

– Failure to clean the filter regularly causes the filter to be covered with dirt, the air conditioner must draw air in and push out less, but the power consumption is higher than usual. Thus, the amount of power consumed is higher, causing more noise but not bringing good cooling efficiency, leading to poor cooling conditions. Air conditioner not cool.

How to fix: You should clean the filter regularly about once a month (depending on usage). For families in the North, it is necessary to thoroughly clean the machine before entering the summer to ensure that the air conditioner achieves optimal cooling efficiency.

Why is the air conditioner not cool: dirt clings, long time no cleaning

2. Air conditioner is missing or out of gas

– Improper assembly causes the gas pipeline to leak or be used for a long time without gas filling, causing insufficient gas to cool the air.

– Common symptoms when air conditioning Out of gas as follows:

+ Snow clings to the small pipe valve of the indoor unit.

+ The operating current is lower than the rated on the machine.

+ New air conditioner product lines often automatically shut down after 10 minutes -15 minutes and report an error.

How to fix: You should go to a reputable maintenance and repair center for timely support. In particular, you should check and clean the machine overall for 3 months or more to keep it working properly.

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Why the air conditioner is not cool: Out of gas

3. The air conditioner is not cool because the compressor is broken

– Compressor is an important part for air conditioner, when the compressor fails, the air conditioner still works normally but the air blown out from the machine is not cooled.

– There are many causes of compressor damage: loss of power supply, control circuit failure, …

How to fix: This part requires a professional repairman to promptly check and fix it, avoiding the case that the customer will replace the whole thing with a new one, causing waste.

Why the air conditioner is not cool: The compressor is broken

4. Damaged capacitor, circuit board

– Damaged capacitors and circuit boards will turn the air conditioner into a regular blower. Common causes of air conditioning not cooling due to this cause include:

The air conditioner is overloaded.

+ The air conditioner is maintained at too low a temperature (below 20 degrees Celsius) continuously for too long.

How to fix: To fix the condition that the air conditioner is not cool due to a broken capacitor, the circuit board you need:

Why the air conditioner is not cool: Damaged capacitor, circuit board

+ Contact the maintenance center to be replaced with new capacitors, circuit boards.

+ To minimize damage to the capacitor, only maintain the air conditioner at a temperature of 25 – 27 degrees Celsius.

+ Regularly clean the circuit board to prevent insects and spiders from nesting, causing short circuit boards. When cleaning, the power must be turned off to ensure the safety of the user.

5. Power overload

– In the hot summer, the family’s demand for electricity increases, causing overload in many areas. Weak and unstable power supply causes the compressor (machine block) to overheat, have poor cooling capacity or stop working.

How to fix: On hot days to avoid the condition that the air conditioner is not cool, you should use an additional voltage stabilizer to stabilize the power source, ensure that the air conditioner always works well to promptly meet the cooling needs of your family.

Why the air conditioner is not cool: Power overload

Refer: What is Multi Air Conditioner? 5+ Advantages and disadvantages of Multi . air conditioner

6. Set the wrong mode to make the air conditioner only wind but not cold

– Setting the wrong cooling mode is one of the reasons why the air conditioner only has wind but not cold. This may come from you mistakenly turning on other function buttons such as heating, fan, …

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Why the air conditioner is not cool: Wrong setting of cooling mode

How to fix: To be sure to turn on the correct cooling mode, you need to understand the different symbols, some common symbols you need to know:

+ Cool: Snowflake shape

+ Dry: Water drop shape

+ Heating mode: Sun shape

+ Auto mode.

7. Air conditioner is leaking water

– Air conditioner running water for a long time causes a layer of moss to form on the drainage pipe, causing a blockage that prevents water from escaping, leading to the phenomenon of the air conditioner not being cool. Since then, the cooling capacity of the air conditioner is also significantly reduced.

Why the air conditioner is not cool: the air conditioner is leaking water

How to fix: Immediately contact the service center to clean or replace the drain pipe.

– Note: The water pipe has enough slope for the water to easily drain out.

8. Install the air conditioner in the wrong position

– Install the evaporator facing the wind direction: In places with a lot of wind, do not install the rig facing the wind direction, because the wind causes the air conditioner to dissipate and causes the air conditioner to work harder to provide enough coolness. . Ideally, install the air conditioner perpendicular to the wind direction.

– Installing the air-conditioner in the corner of the hot wall: With limitations on the area or suitable installation angle, this installation situation is quite common. However, this easily leads to the condition that the air conditioner has to run overloaded when it has to cool the superheated wall first and then the room air, resulting in the air conditioner not being cool.

Why the air conditioner is not cool: Install the air conditioner in the wrong position

How to fix: You should install the air conditioner in cool corners so that the temperature in the room drops quickly and then slowly cools the surrounding walls. However, it should also be noted that the conduction system should not be pulled between the outdoor and cold units for too long because that way the system will not work optimally.

9. Block air conditioner not running

– One of the possible causes of the air conditioner not cooling can be mentioned that the air conditioner block does not run, which also leads to the air conditioner not cooling. This can be caused by the following:

+ The compressor has no power supply: Due to the control board, the circuit is open or the contactor is not closed.

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+ Thermic protects the compressor: Due to damage to the capacitor, the outdoor unit is damaged by the fan, the compressor motor is not working properly.

+ Burn the motor coil inside.

Why the air conditioner is not cool: The air conditioner block is not running

How to fix: First you need to find out the exact cause of the air conditioner block not running. In case of a motor coil fire, you should replace it by repairing only for a while.

10. Leaving the air conditioner temperature too low

– There is a misconception that turning on the air conditioner at the lowest setting will make the space cool and cool faster without affecting the life of the air conditioner. However, in fact, when you turn on the air conditioner and choose the lowest temperature for many days in a row, it will make your air conditioner work worse, even severely damaged.

Why the air conditioner is not cool: Leaving the temperature too low

How to fix: In order for the condition of the air conditioner not to be cool due to this cause, it is best to choose the average mode when turning on the air conditioner at 25 – 27 degrees Celsius or the difference with the outdoor temperature is about 5-7 degrees Celsius. This heat also helps the machine operate more efficiently and prolong its life.

11. Air conditioner capacity is not enough

– This air conditioner capacity is governed by many things such as the heat source in the room, building materials, room size, number of users.

How to fix: In order for the air conditioner to work effectively and without the phenomenon of air conditioning not being cool, you should choose an air conditioner that is suitable for the installation area. Here are some suggestions for installing the right capacity for the area:

Why the air conditioner is not cool: The capacity is not enough

+ Rooms under 15m2 should use air conditioners with a capacity of 9000 BTU.

+ Room from 15-20m2 should choose to buy an air conditioner with an operating capacity of 12000 BTU.

+ Rooms from 20 – 30m2 should choose an air conditioner with a capacity of 18000 BTU.

+ Room from 30-40m2 should choose to buy with a capacity of 24000 BTU.

Above are 10+ reasons why Air conditioner not cool, wish you a successful fix and have a satisfied experience. Thanks for following the post.

TechtipsNReview.com

Source: 10+ Common causes of air conditioning not cooling and how to fix it

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