
Home Aircon Troubleshooting Guide – Given the island’s tropical climate, air conditioning units are a quintessential part of our lives.
However, aircon units can occasionally malfunction or become less efficient, creating discomfort.
Here’s a guide for easy troubleshooting tips that could bring your aircon back to life before reaching out to a professional.
Remember, these fixes are intended for common, non-technical issues. Always consult a professional for intricate problems.
Even with regular aircon maintenance, aircon units may need repairs from time to time. Read on – Home Aircon Troubleshooting Guide:
Unresponsive Aircon: Checking the Power Connection
Sometimes, the simplest solution is the right one.
If your aircon unit is not turning on, the first thing to check is its power supply. Ensure that:
- The power cord is securely connected
- The circuit breaker hasn’t been activated
- The fuse remains intact
This quick fix can save you a service call and return your unit to normal operation.
Reduced Cooling: Cleaning or Replacing the Filters

Aircon units can lose their cooling effectiveness over time.
One common reason for this is a dirty or clogged air filter, reducing the airflow and cooling capacity.
Cleaning or replacing the filters is a task you can do on your own:
- Clean the filters every two weeks during high-usage periods.
- Replace them every few months or as recommended by the manufacturer
Refrigerant Leaks: Sealing and Recharging
Refrigerant leaks are a common issue in aircon units.
They reduce your system’s efficiency and are detrimental to the environment. Dealing with a refrigerant leak requires one to:
- Identify and patch the leak’s source
- Refill the system with the correct refrigerant volume
Professionals should ideally perform this task because of its intricate nature and the potential risks of handling refrigerants.
Ice Build-Up: Checking for Proper Airflow
Ice can accumulate on your aircon unit if the evaporator coil becomes too cold due to restricted airflow. Check for:
- Blocked vents
- A clogged filter
Both of which could limit air circulation. If the ice build-up persists after resolving these issues, a refrigerant leak might be the culprit, requiring professional assistance.
Leaking Water: Emptying the Drain Pan

Water leaks are another common aircon problem. Often, this issue can be resolved by:
- Emptying and cleaning the drain pan
If your aircon continues to leak after this procedure, it might signify a more severe issue, such as a cracked drain pan or blocked condensate line, warranting professional intervention.
Strange Noises: Identifying Potential Issues
An aircon unit making unusual noises is a cause for concern.
Grinding, squeaking, or rattling sounds can indicate loose parts, while a buzzing noise might indicate an electrical problem.
If tightening visible screws doesn’t solve the issue, it’s best to call a service technician.
Foul Odours: Investigating the Source
If your aircon unit emits a foul smell, it could be due to various issues, such as bacterial growth on the evaporator coil or a clogged drain line.
Regularly cleaning your aircon unit, including the evaporator coil and filters, can often resolve this issue.
Uneven Cooling: Balancing the System
If some areas of your home are cooler than others, your aircon system might need balancing.
This procedure involves adjusting the system’s dampers to distribute air throughout your home evenly.
While you can attempt this fix, consider seeking professional help to ensure proper balance and avoid damaging the system.
Short Cycling: Considering the Thermostat

If your aircon frequently turns on and off, it might be “short cycling.” This issue can often be resolved by adjusting your thermostat:
- Ensure it’s not exposed to direct sunlight or heat sources
- These conditions can cause it to register incorrect temperatures
High Energy Consumption: Energy-Saving Practices
An unusually high energy bill might be your aircon system’s cry for help.
Frequent or unnecessary aircon use, keeping the temperature too low, or running an older, less energy-efficient unit could be potential reasons.
Adopt energy-saving practices like:
- Using fans to circulate the cooled air
- Keeping the aircon temperature at an optimum 24-25°C
- Upgrading to a more energy-efficient model if your aircon unit is old
Fluctuating Temperatures: Checking the Refrigerant Levels
If your aircon is not cooling consistently or adequately, it could be due to low refrigerant levels.
Refrigerant is the substance that your aircon uses to remove heat and humidity.
While you can’t check refrigerant levels yourself, you can suspect this issue if you notice temperature fluctuations or if your unit takes longer than usual to cool your space.
If this is the case, call a professional for help.
Frequent Breakdowns: Considering Unit Replacement
Despite the best maintenance efforts, aircon units have a finite lifespan like any other appliance.
If your aircon unit is over ten years old and experiencing frequent breakdowns despite regular maintenance, it may be time to consider replacing it.
Modern aircon units are more energy-efficient and equipped with advanced features, offering better performance and potentially reducing your energy bills.
Prioritizing Safety: When to Call a Professional
Remember, while troubleshooting is practical, safety should always be a priority.
Suppose you’re unsure about any aspect of your aircon unit.
If the fixes mentioned above don’t work, or if the unit requires opening up or dealing with electrical components, it’s time to call a professional.
Aircon servicing in Singapore is easy to find and often provides comprehensive checks and repair services that ensure your unit runs smoothly and safely.
Home Aircon Troubleshooting Guide – Conclusion

This guide to aircon troubleshooting in Singapore covers the most common issues that homeowners may encounter.
By being observant and taking immediate action, you can often fix small problems before they become big ones.
However, never hesitate to call for professional service if the problem seems too complex or persists despite your best efforts.
Regular maintenance and proper care of your aircon unit will ensure a comfortable and cool home environment in Singapore’s tropical climate.
Remember, Prevention is Better than Cure!
Proactive maintenance is crucial to your aircon unit’s efficient functioning and longevity.
Adopting good habits like cleaning filters regularly, ensuring unblocked airflow, and scheduling professional maintenance checks can go a long way in preventing aircon issues.
As the saying goes, prevention is better than cure. Stay cool, Singapore!