Common Aircon Problems & Solutions: A Quick Guide

In the sweltering heat of Singapore, air conditioners aren’t just a luxury; they’re an absolute necessity. As with all machinery, they come with their fair share of issues – from the frustration of poor cooling to the annoyance of noisy operations.

Our guide explores the common troubles faced by air conditioners and offers practical solutions to ensure your environment remains blissfully cool and serene.

At iCare Aircon, led by myself, James Tan, we bring two decades’ worth of knowledge to keeping these essential devices running smoothly. Having encountered every possible problem from refrigerant leaks to complex electrical faults, our team is well-equipped for any challenge.

Eager for some respite from the heat? Let’s begin this journey together.

Key Takeaways

  • If your air conditioner doesn’t turn on, check the power supply and thermostat before looking for internal faults.
  • Clean or replace dirty air filters to prevent airflow issues and maintain efficient cooling.
  • Always call a professional from iCare Aircon to fix refrigerant leaks, as they can reduce efficiency and damage the system.
  • For electrical problems or if your AC unit won’t shut off, expert help ensures safe and effective repairs.
  • Regular maintenance like cleaning around the outdoor unit helps avoid overworking and potential breakdowns.

Troubleshooting a Non-Responsive Air Conditioner

A close-up of a circuit breaker panel and thermostat.

We always check the power supply first for a non-responsive air conditioner. A common issue might be with the circuit breaker or fuse box. We make sure they haven’t tripped or blown, which can cut off power to the unit.

If everything looks good there, we inspect for any broken or burnt wires that could stop electricity from reaching your air conditioning system.

Next, we look at the thermostat setting. Sometimes, it’s just set incorrectly or has run out of batteries. Replacing them can quickly fix the problem. If these steps don’t work, we suspect faulty internals like a bad compressor or damaged printed circuit board inside your HVAC unit.

These parts are critical for the operation and signal deeper issues needing professional repair by our team at iCare Aircon.

Solutions for Air Conditioners Not Cooling

First, check the air filters. Dirty ones block airflow. Clean or replace them to boost cooling. Next, inspect the outdoor unit for debris and clear it away to improve performance. Low refrigerant levels also cause poor cooling.

Arrange for a professional from iCare Aircon to refill the gas and fix leaks.

If these steps don’t cool your space, your HVAC system might need more work. The evaporator coils could be dirty or the compressor malfunction. A skilled technician can clean coils and assess the compressor’s condition.

Regular maintenance prevents these issues, ensuring efficient cooling all year round.

Addressing AC Refrigerant Leaks

AC refrigerant leaks can lower your unit’s efficiency and lead to higher energy bills. Leaks also cause coil freezing and harm the compressor. We always urge homeowners to call us, iCare Aircon, right away if they suspect a leak.

Our techs are experts at finding leaks, fixing them, and topping up the gas in the system.

Low refrigerant makes short cycling and frozen evaporator coils more likely. With our gas top-up service, we ensure your aircon runs smoothly again without wasting power or risking damage.

Resolving Electrical Issues in Air Conditioners

We tackle electrical issues in air conditioners with care. Faulty wiring or tripped circuit breakers can stop your unit from turning on, leading to uncomfortable indoor temperatures.

A blinking status light signals trouble inside the system, often linked to electrical problems. We advise you not to fix these on your own due to safety risks.

Our team steps in immediately when such problems arise, preventing further damage to your cooling system. Calling iCare Aircon ensures professional electricians address and solve the issue quickly, restoring comfort and efficiency to your home’s climate control without delay.

Fixing an Air Conditioner that Won’t Shut Off

We often face air conditioners that refuse to shut off, leading to increased energy consumption. This can stem from a thermostat set too low or issues within the cooling system itself.

Our first step involves checking the thermostat settings. Adjusting it to a higher temperature might solve the problem immediately. If this doesn’t work, we suspect either a faulty thermostat or miscommunication between it and the air conditioning unit.

Next, we inspect the aircon’s external unit for continuous operation signs. The condenser unit outside might be dirty or blocked, causing it to overwork and not switch off as expected.

Cleaning around this area ensures nothing obstructs airflow or overheats components.

Our technicians will also look into potential electrical problems if initial checks don’t resolve the issue. Faulty wiring or stuck relays within your central air conditioner can cause it to run non-stop regardless of thermostat settings.

With these steps, we tackle common culprits behind an air conditioner that won’t shut off—ensuring your comfort while saving on unnecessary costs.

Dealing with Frozen Evaporator Coils

Frozen evaporator coils stop your aircon from cooling. This happens when airflow gets restricted. Dirty filters, blocked vents, or a faulty blower motor could be why. First, turn the unit off to let the coils thaw.

Next, check and clean or replace your dirty air filter. Sometimes, you need to clear blockages in vents or ductwork.

If these steps don’t fix it, cooling might still not happen right. It’s because the problem can be more complex inside your air conditioning system. In such cases, calling us at iCare Aircon makes sense.

We look into the issue deeply – maybe a fan isn’t working as it should or something else is wrong with the blower motor. Our team sorts out these tricky situations effectively to get your aircon back in shape fast.

Cleaning Dirty or Clogged Air Filters

Air filters catch dust and dirt to keep indoor air clean. Over time, they get dirty and need cleaning or replacement. This helps your aircon work better, uses less power, and stops coils from freezing up.

We suggest checking filters monthly and cleaning as needed for best performance.

Clogged filters make the system work harder, leading to breakdowns. Regular maintenance prevents this and keeps the air fresh in your home. Use a vacuum cleaner to remove loose dust, then wash the filter with water if it’s reusable.

For disposable ones, replace them every three months to ensure efficient cooling and heating throughout the year.

Practical DIY Tips for Aircon Maintenance

Keeping your air conditioner in top shape is easy with some DIY tips. You’ll learn how to handle a filter and reset a control panel for better cooling at home.

How to Check and Replace Air Filters

We always check air filters for dirt and debris. To maintain indoor air quality, we clean or replace these filters regularly. This prevents problems like frozen evaporator coils in your air conditioning system.

To replace a filter, first, turn off the unit. We remove the old filter carefully. Then, we put in a new one making sure it fits well and seals the space to keep air flowing properly.

Regular checks and replacements help stop airflow issues in your home’s cooling system.

Steps to Reset Your Thermostat

First, check your thermostat batteries. Dead batteries can cause trouble. Replace them if needed. Next, look at the programming settings. Sometimes they get changed by accident. Make sure they’re set right for cooling or heating your room just how you like it.

If that doesn’t fix the issue, find your circuit breaker box. Turn off the breaker for your aircon system. Wait a minute, then turn it back on. This simple step can reset your smart thermostat and solve uneven temperature problems in your home.

These actions ensure accurate temperature readings from your thermostat, leading to better aircon performance.

If these steps don’t work, call us at iCare Aircon. We’ll help sort out any tricky issues with your air conditioning unit right away.

Recognising When to Contact an Aircon Professional

Sometimes, aircon issues need expert hands. Small fixes like cleaning filters or resetting your thermostat can be DIY jobs. But certain problems signal it’s time to call us at iCare Aircon.

If you spot refrigerant leaks, hear strange sounds coming from your unit, or notice your air conditioner is not cooling as it should—these are clear signs. We know Singapore’s hot and humid climate makes air conditioning a must-have.

Dealing with complicated electrical faults or a broken compressor fan often requires special tools and knowledge that only trained technicians have. Attempting to fix these on your own might cause more damage—or even void your warranty.

At iCare Aircon, our team deals with all sorts of air conditioner woes daily. We’re equipped to handle tough jobs that ensure smooth-running systems all year round in Singapore’s relentless heat.

So if you’re facing any serious issues with your cooling system, save yourself the headache and potential extra costs down the line—reach out to us directly!


We’ve shared key insights and DIY fixes for common aircon woes. From non-responsive units to frozen coils, we covered the lot. For stubborn problems—like refrigerant leaks or electrical hitches—professional help is best.

Regular upkeep cuts down on issues and keeps your system efficient. Faced a tricky challenge? Drop us a line at Let’s keep your cool air flowing smoothly with iCare Aircon by your side.


1. What causes unusual noises in aircon units?

Unusual noises often come from loose parts, like in the condenser coil or air ducts. It’s a sign your unit needs checking.

2. Why does my room air conditioner smell like mildew?

Mildew smells occur when humidity collects and doesn’t drain properly… It means it’s time for a thorough cleaning or check on the drainage system.

3. How can we save energy with our central air conditioning systems?

Regular maintenance ensures your system runs efficiently… Also, installing programmable thermostats helps manage usage, cutting down costs.

4. What should I do if my aircon isn’t cooling properly?

First, check if there’s a blockage in filters or coils… If not, it might be low on refrigerant or have issues with its contactor. Servicing could fix these problems.

5. My air conditioning unit leaks water inside; what’s wrong?

Water leakage inside usually points to a blocked drain pipe or issues with the condensation process… A quick service call can resolve this issue quickly.

Need help with your air-conditioning woes? Contact iCare Aircon at for expert servicing and peace of mind today.

About the Author James Tan

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