If your aircon is not cooling properly, it can be very frustrating, especially during hot days. Instead of feeling comfortable, you end up sweating and wondering what went wrong.
The good news is that many aircon problems are simple and can be fixed at home. In this guide, you’ll learn the common reasons why your aircon is not cooling and what you can do to fix it step by step.
Quick Summary
Aircon not cooling properly is a common problem, especially during hot days, but many causes are simple and easy to fix. Before calling a technician, you can check a few basic things that often solve the issue quickly.
This guide walks you through beginner-friendly steps to restore your aircon’s cooling performance at home.
Check if your aircon is set to cool mode with the right temperature
Clean or replace a dirty air filter to improve airflow
Remove any blockages like curtains or dust around the unit
Do basic cleaning of the aircon unit for better efficiency
Call a technician if the issue is related to low refrigerant or internal damage
Fixing your aircon starts with simple checks—small actions can bring back cool air fast.
Before trying to fix the issue, it’s important to understand what might be causing it.
In most cases, the problem is related to dirty filters, blocked airflow, or incorrect settings. Sometimes, it can also be due to low refrigerant or mechanical issues.
The key is to check the simple causes first before assuming it’s a major problem.
Simple Ways to Fix Aircon Not Cooling Properly
1. Check Your Aircon Settings
Start with the basics.
Make sure your aircon is set to cool mode, not fan mode. Also, check the temperature setting and lower it if needed.
Sometimes the issue is just incorrect settings.
2. Clean the Air Filter
A dirty air filter is one of the most common reasons why an aircon is not cooling properly.
Dust and dirt block airflow, making it harder for the unit to cool the room.
Remove the filter, wash it with water, let it dry completely, then reinstall it.
If your filter is already damaged or very dirty, replacing it can make a big difference. You can check a compatible aircon filter here (Shopee link)
3. Check for Blocked Airflow
Make sure nothing is blocking your aircon.
Check:
Curtains
Furniture
Dust buildup
Proper airflow is important for cooling efficiency.
4. Clean the Aircon Unit
Over time, dirt builds up inside the aircon, especially in the evaporator and condenser.
Basic cleaning can improve performance.
If you plan to clean it yourself, using an aircon cleaning kit makes the process easier. You can check one here (Shopee link)
