Why is the aircon not cold?
There are several factors that can cause the aircon not cold enough. Imagine spending all day in the sun and all you want to do when you reach home is to chill in a cold air conditioned room and yet when you have switched it on for more than 30 minutes, it is still not cold! Frustrating right? There is literally no cold air from the air conditioner. Nothing at all!
Well there are a few possible factors contributing to this “hot aircon” issue. Read on and check if any of these is possibly affecting the cooling air system.
Most common reasons as to why is the air conditioner not cold are:
1. Clogged air filter
Air cannot flow through properly thus greatly affecting the cooling capacity. It could be due to too dusty and such as happen especially if the air conditioner is switched on with open windows.
2. Dirty condenser coil
Dirty coils that are loaded with debris are unable release heat outside. As the coil get dirtier the air con will be more less and less effective.
3. Coolant running out
Coolant flow through the evaporator coil to cool the air flowing through it. When the coolant run low, the air coming out of the air con in turn also get less cold.
4. Compressor breakdown
Compressor is the heart of the air conditioner. It circulate the cooler around the coil.
5. Small air conditioner
Size does matter. A bigger room require a bigger aircon. If you place a small air conditioner in a big room, it is going to be less ineffective.
6. High environment temperature
When the environment temperature go over the optimum temperature limit, the air con might even stop working.
What can you do for why is the aircon not cold?
You can contact your aircon specialist for good aircon services and aircon repair if necessary. Never attempt to clean or fix it yourself. Thank you for reading. Please share this blog post on your social media. Sharing knowledge is caring.
Book conveniently online for your aircon servicing appointment by clicking on the link below:
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Good service
Eddie Soh
October 17, 2026This is my first time calling for general servicing for 4 fan coils. Jack and Ck came within the given time calling me in advance that they were on the way here. After checking they informed me the need to flush the piping as well . The prices was quoted and I agreed. All this while, they were very courteous and completed their tasks within around half an hour. They were very careful in cleaning up after washing the blower in one of the toilet. Comparing with one of the other aircon servicing Co which I had called earlier, they did an exceptional job. Done a good job!
Jasmi Mohd Sharip
October 14, 2026Great service! No hidden fees - pricing and things covered for servicing are discussed beforehand
Cheng Cynthia
October 14, 2026 -
Thank you kenny Team, punctuality and efficiency. No hard selling and stuffs. Noted some issues with our only 2 year old aircon sigh. Paid much more this time . Hope after this can maintain a little longer till the next step to fix the main issue. Recommended (:
s
October 14, 2026Great service from Kenny and his team! The technician arrived on time, was friendly, and did a thorough job servicing the air-con. Everything was explained clearly, and the cooling performance has improved a lot. The price was reasonable too. Highly recommended! 👍
Puteri Nurain
October 14, 2026Good and prompt service by Mk and Haoming. Glad that they were able to come at my urgent request and despite being fully booked.
Charmaine
October 14, 2026 -
Great experience! I signed up for their packages, and the office proactively reaches out to schedule appointments when they’re due. The cleaning service is consistently good, fast, and professional. Highly recommended!
Chiayin Wong
October 9, 2026Fast and efficient. Quick respond!
5tev3n Tang
October 9, 2026Good communication from the beginning until the service was completed.
Hui
October 8, 2026
Frequently Asked Questions
Should I repair or replace my aircon if it’s not cooling?
If your aircon is not cold and frequent repairs are needed, it might be more cost-effective to replace it. Our team can help assess your aircon’s condition and recommend the best course of action. Visit our About Us page for more information.
How can I tell if my aircon’s compressor is faulty?
If your aircon is not cold and you hear strange noises or notice warm air coming from the vents, it could indicate a faulty compressor. Contact us to diagnose and repair any issues with your compressor.
How can I prevent my aircon from not cooling in the future?
To prevent your cooling issues in the future, schedule regular servicing, clean the filters, and check refrigerant levels. Routine servicing every 6 months helps keep your aircon running efficiently. For more details about the services we offer, visit our Home page.
How often should I clean or replace my aircon filter?
It is recommended to clean or replace your aircon filter every 1 to 3 months, depending on usage and environment. Dirty filters can affect airflow and cooling performance. If your aircon is not cold or facing any other issues, don’t hesitate to contact us for a professional consultation.
When should I call for professional aircon help?
If your aircon is not cold, leaking water, or frequently breaking down, it may be best to call for professional aircon services. A qualified technician from Good Cool can diagnose and resolve problems that require expert attention.