Air conditioner not cool? The cause and how to fix it

 When the air conditioner is not cool, users need to immediately find out the cause and how to fix it to avoid serious damage and save costs.

The reason is that the air conditioner is not cold, only wind

Turn on the fan in the wrong mode

Accidentally or due to a child playing with the air conditioner by mistakenly pressing the air conditioner control and adjusting it to the fan mode (Fan), causing the device to not cool and instead operate in wind mode.

The air conditioner is too dirty

After a period of use, the air conditioner may have dust and dirt on the two radiators inside and outside the house. Clogged dust on the filter causes cold air flow to be obstructed and unable to cool your room. Therefore, when there is a lack of cold, you should observe whether the outdoor unit is dusty or not, and see if the indoor filter is clogged with dust, blocking the circulation of cold air.

Air conditioner not cool? The cause and how to fix it Picture 1

Once this is the correct cause, the fix is ​​simple as follows:

- If the machine is installed in an easy location and is not too dirty: You can clean the air conditioner yourself by washing the indoor filter. For the outdoor unit, use a broom to lightly brush the radiator while still letting the machine run.

- If the machine is installed in a location that is difficult to operate and is too dirty: You should ask a technician to service it. In order for your home's air conditioner to operate stably, you should periodically maintain it every 1 - 2 years and be sure to call a familiar or reputable technician because otherwise it is very easy for the technician to "cut corners" and refill the air conditioner gas by automatically releases gas, then forces you to pay for additional gas refills.

The air conditioner is not cold due to lack of gas or running out of gas

One of the other quite common causes is lack of or running out of gas, causing the machine to operate weakly and unable to radiate cool air. Therefore, if after a general cleaning and maintenance, you still feel less cold, then you need to check the gas.

In case there is a large lack of gas within a short period of use, the cause of the leak must be found and fixed before refilling the gas. When adding additional gas without checking, it will only lose gas and cold again after a while. The machine is always clean and has enough gas, it will consume less power and be more durable.

Air conditioner not cool? The cause and how to fix it Picture 2

The compressor is broken

When the compressor fails, the air conditioner still runs normally but the air blown from the machine is not cooled.

The cause of a broken air conditioner compressor may be due to a control circuit error, loss of power supply. In this case, you must call a professional air conditioning unit and repairman to check and fix it.

Damaged capacitors and circuit boards

The air conditioner will turn into a regular fan if the capacitor or circuit board of the machine is damaged.

Two common causes of circuit board and air conditioner capacitor failure are due to the air conditioner maintaining a temperature that is too low (below 20 degrees Celsius) continuously for a long time or the air conditioner is overloaded.

How to fix:

1. Replace capacitors and circuit boards.
2. The air conditioner should be maintained at a temperature of 25 - 27 degrees Celsius to minimize damage.
3. Regularly clean the circuit board to prevent insects and spiders from nesting and causing short-circuit fires. To ensure safety, the power must be turned off before cleaning the air conditioner.

Air conditioner is leaking water

Air conditioners that run water for a long time will cause moss to grow in layers on the drainage pipes, causing blockage, preventing water from escaping and reducing cooling capacity.

Solution: Clean or replace the drainage pipe.

Note: When installing, the water pipe must be sloped sufficiently so that water can easily drain out.

Electrical overload

In the hot summer, people's demand for electricity increases, causing overload and weak and unstable power sources. This causes the compressor (engine block) to heat up, reducing or even stopping its cooling ability.

To ensure the air conditioner always works well on hot days, you should use an additional voltage stabilizer to stabilize the power source.

How to fix air conditioner that is not cold but only has wind

Adjust the air conditioner to normal mode

Check on the air conditioner's control panel to see if the device is in fan mode. If you see the Fan mode (fan image) light up, it means the air conditioner is in fan mode, turn it off and reinstall the Cool mode (snowflake image) to activate the cooling mode.

Clean and maintain air conditioner periodically

You should clean the air conditioner periodically according to the frequency of use. If you turn on the air conditioner 3-4 days/week, clean it about once every 4 months, or clean it every 6-9 months if you only use the air conditioner occasionally. .

When cleaning the air conditioner, you can follow these steps:

1. Step 1: Turn off the air conditioner circuit breaker to ensure electrical safety when operating.
2. Step 2: Clean the indoor unit. Remove the outer mask layer, take out the dust filter to clean separately. Use a water spray (light level) to clean some parts inside the condenser.
3. Step 3: Clean the outdoor unit. Remove the outer cover from the heater, then use a spray nozzle to clean the fan blades and inside corners. Check gas and pump gas (if necessary).
4. Step 4: Reinstall parts in the condenser and condenser units.
5. Step 5: Start the air conditioner to check the condition of the machine.

So, it's not difficult to find the cause and fix the problem of not cooling the air conditioner, right? Just pay a little attention and be careful and you will use your air conditioner more durable.

Micah Soto

Update 28 March 2024