Why is my aircon not cold? Try this out !

Why is my aircon not cold? Try this out !

Ah, the sweet relief of stepping into a cool, air-conditioned space on a scorching day. But what happens when that blast of cool air you’re expecting feels more like a lukewarm breeze? Frustration sets in, and you find yourself pondering, “Why is my aircon not cold?” Fear not, we’ll delve into the intricacies of air conditioning and uncover the reasons behind its occasional reluctance to chill.

Some fun facts on Aircon

Total Annual Electricity Consumption in Singapore50.3 TWh (2021)
Percentage of Electricity Used for Air Conditioning23%
Average Annual Temperature in Singapore26.7°C
Number of Air-Conditioned Buildings in SingaporeOver 90% of residential and commercial spaces
Energy Efficiency Labeling Program in SingaporeNEA’s Mandatory Energy Efficiency Labeling
Annual AC Maintenance Cost in SingaporeSGD 150 – SGD 300
Green Building Adoption in SingaporeOver 40% of buildings have green certifications
Popular AC Models in SingaporeDaikin, Mitsubishi Electric, Panasonic

Understanding the Basics of Aircon

Before we embark on our troubleshooting journey, let’s grasp the fundamentals. How does an air conditioner work its magic? At its core, it’s a complex interplay of components, with refrigerant acting as the hero. This chemical substance cycles through the system, absorbing heat and leaving cool, refreshing air in its wake.

Common Reasons Your Air Conditioner Isn’t Cold

  1. Dirty or Clogged Air Filters: It turns out those seemingly insignificant filters play a crucial role. When clogged with dirt and debris, they hinder proper airflow, resulting in compromised cooling efficiency. Regular filter maintenance is the unsung hero here.
  2. Refrigerant Issues: Low refrigerant levels or sneaky leaks can sabotage your cooling dreams. While it might be tempting to handle it yourself, refrigerant matters are best left to the professionals for inspection and maintenance.
  3. Evaporator and Condenser Coil Problems: Coils, both inside and outside your unit, can accumulate dirt over time, diminishing their ability to transfer heat effectively. Regular cleaning and maintenance can keep these coils in top-notch condition.
  4. Faulty Thermostat: The thermostat, the commander of temperature regulation, might be throwing a tantrum. Look out for signs of malfunction and consider troubleshooting or replacing it to restore order.
  5. Electrical Problems: Capacitors and relays on the fritz, or a misbehaving compressor, can be culprits in the cooling caper. Delicate electrical matters demand a cautious approach – safety first!

DIY Troubleshooting Tips for aircon

Before you rush to call in the cavalry, there are a few DIY steps to consider. Check filters, inspect coils, and give the thermostat some attention. But remember, there’s no shame in waving the white flag and summoning a professional when needed.

Regular aircon Maintenance Practices

Prevention is often the best cure. Regular air conditioner maintenance, including filter changes and coil cleanings, can stave off potential issues. A handy checklist for homeowners and periodic professional inspections are your weapons in this battle for cool comfort.

Upgrading Your Air Conditioner

If your cooling companion is showing signs of retirement, it might be time to explore newer, energy-efficient models. Choose wisely, considering factors like size, type, and your specific cooling needs.

Ideal Usage Duration for Aircon

The recommended duration for running an air conditioner in a house per day can vary based on factors such as climate, energy efficiency of the unit, and personal comfort preferences. In Singapore, where the climate is generally warm and humid, air conditioners are commonly used to maintain a comfortable indoor environment.

Ideal Usage Duration : It’s generally advisable to limit continuous usage to about 8 to 10 hours per day. This allows the air conditioner to cool the space effectively without overworking the system.

Ideal Usage Duration8 to 10 hours per day
Energy Efficiency ConsiderationsOpt for units with high EER or SEER ratings
Temperature SettingsSet thermostat between 24-26°C
Use of Programmable ThermostatsConsider investing in a programmable thermostat
Regular MaintenanceEnsure regular maintenance, including filter cleaning or replacement
Consideration of HumidityBe mindful of both cooling and dehumidification effects; avoid overcooling
Natural VentilationTake advantage of natural ventilation during cooler parts of the day or night


In the quest for coolness, understanding the nuances of your air conditioner is key. Regular maintenance, DIY troubleshooting, and knowing when to call in the experts are your tools for ensuring that refreshing breeze is always just a switch-flip away. So, fear not the warm air – conquer it! You will never need to ask “Why is my aircon not cold?” again!

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