Aircon Not Cold – Cause & Troubleshooting Tips

Have you noticed your aircon’s cooling power decreasing lately? If so, then it may be time to troubleshoot the problem and make sure it can still keep your home comfortably cool. In this blog post, we’ll share some helpful tips on how you can get your aircon back up and running again at its optimal coldness. Read on to find out more!

What Causes Loss Of Aircon Coldness?

Common problems include dirty air filters, weak airflow, refrigerant leakage and faulty compressors.

Dirty Air Filter

Dirty air filters are one of the most common reasons for a loss in aircon coldness. When an air filter is clogged, it blocks airflow, making your AC unable to cool down efficiently. Regular maintenance and cleaning of the filter reduces this problem and should be done regularly to ensure that your AC unit when functioning properly.

Air filters can also cause problems with dust, allergens and dirt buildup. This reduces the efficiency of your system even more as it causes additional strain on the cooling system while working harder to pump out cool air. It is essential to replace or clean an air filter every few months if there is a buildup of dirt and debris on it in order for optimal performance from your air conditioner.

Weak Air Flow

Weak airflow can prevent the cooled air from reaching inside the room, leading to ineffective cooling. This situation is usually caused by blocked registers and ducts due to dust collection, so it would be best to clean them regularly.

Dirty coils in the evaporator may also reduce airflow, resulting in a lukewarm temperature inside a room; coil cleaning or replacement might do the trick if this is found to be the case.

Refrigerant Leakage

Refrigerant leakage is one of the primary causes of the loss of aircon coldness. When refrigerant leaks out, the compressor can no longer efficiently create cool air and the temperature produced by the unit will be warmer than desired. Refrigerants are found in the copper pipes that connect to your outdoor unit and run deeper inside your walls. If these pipes have any cracks or holes which cause a leak, it needs to be repaired immediately to prevent further damage.

One way to identify if you have a leak would be through visual inspection. Look around both indoor and outdoor units for any signs of moisture or oil near joints in pipes or gauges on compressor valves; this could indicate a potential fault with your system and require professional attention. Additionally, you may also experience an increase in electricity bills due to more energy needed to produce cooler temperatures when dealing with low refrigerant levels caused by leaks. Contacting an experienced aircon service provider is highly recommended as they will use specialized tools designed specifically for detecting and repairing tiny leaks easily located at hard-to-reach spots within air conditioners’ systems

Faulty Compressor

The compressor is the heart of your air-conditioning system. When it malfunctions, it can cause a significant drop in cooling performance. Malfunctions may be caused by overworked parts or lack of lubrication due to low maintenance routine, which would lead to part breakdown and eventual failure. If this happens, you should contact a professional technician for diagnosis and proper repair.

Faulty compressors can also be identified with some visual signs such as bulging capacitors, degraded wiring insulation or corrosion on contacts. These components should all be inspected thoroughly before taking further steps to resolve any issues related to faulty compressors.

Troubleshooting Tips To Make Your Aircon Cold Again

From checking the air filter to inspecting the fan and condenser coils, find out how you can troubleshoot your aircon to get it cold again. Read on to learn more!

Check The Air Filter

The air filter is one of the most important components in an aircon system. Regular cleaning and replacing of this filter can prevent contaminants from clogging up the unit and reduce coldness. Inspecting the air filter regularly should be part of your maintenance routine to make sure it is not blocked or dirty.

When inspecting, look for signs that dirt has accumulated on its surface or if it needs replacement due to wear and tear after months of use. If you find that the air filter requires cleaning or replacement, make sure to do so immediately in order to keep your Aircon running optimally.

Inspecting other areas such as the fan coils, refrigerant levels and vents also helps ensure optimal performance and longevity for your Aircon system without having to worry about loss of coldness again.

Unblock The Air Flow

One way to troubleshoot your aircon’s lack of coldness is by unblocking the airflow. To do this, you should inspect the unit and check any obstructions that might be blocking the vents or fins. Make sure to clean out any dirt, leaves or other debris that might have accumulated over time.

Another way to improve airflow is to check if all registers are open in each room. A common cause for poor cooling is when these registers are partially blocked due to furniture or other objects placed nearby them. If so, move them away from the registers so that cool air can flow freely throughout your home.

Finally, make sure there are no draughts in your house as it can affect how well the air conditioner works in terms of providing cold air inside a space. Check windows and doors for holes or gaps where draughts could enter and seal off any openings with insulation tape where possible.

Test The Refrigerant Levels

It is important to check the refrigerant levels of your aircon if you are experiencing a drop in cooling. Refrigerants are essential substances that allow an air conditioner to convert hot air into cool air. Low levels of refrigerant can cause the unit to be inefficient, so it’s vital that this is checked and addressed promptly.

The best way to measure the level of refrigerant accurately is by checking with a professional technician. They will be able to perform tests and assess whether the gas needs topping up or a more serious repair is needed on your unit. It’s also important for technicians to use certified equipment that has been approved by manufacturers as incorrectly charged units can lead to further issues down the line.

Inspect The Fan And Condenser Coils

It is important to check and inspect the fan and condenser coils when troubleshooting your aircon. If these components are dirty or impaired, they can greatly affect the performance of your air conditioning system. Cleaning off dust buildup on the coils can help improve airflow, making it easier for coolant to pass through them more effectively.

Inspecting for damage in the fan or condenser coil is also necessary. Look out for signs such as corrosion, dents, bends or cracks which may cause leakage of refrigerant over time. Any damaged parts should be replaced immediately by a professional technician to ensure that your unit runs optimally again.

Finally, consider inspecting the motor and its wiring too if you have access to it to make sure there are no issues with voltage supply that would cause overheating during operation which will eventually affect cooling performance as well.

Check For Leaks

Leak detection is an important step in troubleshooting your aircon coldness. If a refrigerant leak is present, it can cause the unit to become inefficient and unable to cool properly. Look for signs of moisture or pooling water underneath the indoor or outdoor unit, as these are indicative of a potential leak. Also, pay close attention to any hissing or bubbling noises coming from the system components as they may be caused by escaping gas.

If you suspect that there might be a refrigerant leak, it’s best to contact an experienced technician immediately so they can check and repair the unit accordingly. Refrigerant leaks must always be handled professionally due to their toxicity and flammability. By having your appliance checked regularly for any possible damage or leaks, you will have peace of mind knowing your Aircon stays cold throughout the year without any issues.

Signs You May Need Professional Help

If your aircon is still not cooling properly even after troubleshooting, it may be time to seek professional help. Read on to learn more!

Strange Sounds From The Unit

Strange and unusual sounds coming from your air conditioner unit could indicate serious problems. Loose parts or damaged components may be causing loud buzzing, thumping, or clanging noises when the AC is switched on. It’s best to have a professional inspect the system for any potential issues before it gets worse.

In some cases, homeowners can fix minor component issues without needing an expert technician. However, if in doubt it’s better to have a trained technician check out the AC as soon as possible. Making simple repairs or replacing faulty parts earlier will spare you from costly replacements later down the line.

To avoid having to spend time diagnosing strange AC sounds at home, look for an experienced service provider with good customer reviews who can quickly diagnose and fix whatever problem you’re facing with your Aircon!

Airflow From The Vents Is Weak

Airflow from the vents is a key sign of an air conditioning system not working correctly. Weak airflow could be a result of blocked filters and dirty fan blades, or it may indicate deeper complications like refrigerant leakages. To check the flow, set your aircon to full blast and compare its performance against previous readings.

Your fan blade must turn freely inside the unit in order for sufficient airflow to take place; if it’s stuck due to dirt accumulation, you can use compressed air to free it up again. Additionally, inspect all the vent grilles throughout your home; make sure they are clean and open for proper ventilation.

If checking these two components does not help with maximizing airflow from your AC vents, then it’s time to call a professional technician who can accurately diagnose other potential issues such as faults in electrical wiring systems or damaged internal parts causing weak cold air discharge.

Uneven Cooling In The House

Uneven cooling in the house suggests that there could be an issue with airflow from the air conditioner or a blockage in the unit. Look for blockages and make sure all vents are free of dust and debris, as well as ensure furniture isn’t blocking any vents. If this doesn’t resolve it, then you may need to check for leaks in your system or look at problems such as a faulty compressor.

You can also test whether one area of your home is cooler than others by measuring the temperature around your living space with a thermometer. This will give you an indication if some rooms are not getting equal airflow from the aircon unit, which means you should investigate further into the causes of uneven cooling.

Finally, always ensure regular maintenance visits to keep on top of any issues related to uneven cooling before they become bigger problems down the road.

Ice Forming On The Coils

Ice forming on the condenser coil or evaporator is another sign that something is wrong with your air conditioning system. If left unresolved, this issue can reduce the cooling capacity and efficiency of your AC unit.

To solve this problem, you must first identify the source of ice formation. It could be due to low refrigerant levels, dirty coils, blocked airflow, incorrect temperature settings or a bad thermostat or capacitor.

Once you have identified the source of the issue, it may require professional service for proper repair and maintenance.


In conclusion, aircon losing its coldness easily is a common issue that can be fixed with simple troubleshooting tips. If the problem persists and you notice any strange sounds, weak airflow or uneven cooling in your house, then it may be time to call a professional for help. With regular maintenance and care, you can ensure that your air conditioner always runs smoothly at an optimal temperature during warmer months!

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