Air conditioning systems play a vital role in maintaining comfort within our homes and offices, especially in places like Perth, where hot summers are a common occurrence. However, even the best air conditioning units can experience issues over time. In this comprehensive guide, we will explore common air conditioning repair techniques to help residents of Perth keep their cooling systems in optimal condition.

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Understanding the Basics of Air Conditioning Systems

To effectively repair your air conditioning system in Perth, it’s crucial to have a comprehensive understanding of its fundamental components. These components work together seamlessly to provide efficient cooling and maintain air quality within your living spaces.


The compressor is often referred to as the “heart” of your air conditioner. It plays a vital role in the refrigeration cycle by compressing low pressure, low temperature refrigerant gas into high pressure, high temperature gas. This process is essential for extracting heat from inside your home and releasing it outside.

Condenser Coils:

Located in the outdoor unit, condenser coils are responsible for releasing the heat absorbed from your indoor space. They dissipate this heat into the surrounding air, allowing the refrigerant to cool and return to a liquid state. Clean and efficient condenser coils are vital for optimal cooling performance.

Evaporator Coils:

These coils are located in the indoor unit and are responsible for absorbing heat from the air inside your home. When warm air passes over the evaporator coils, the refrigerant within them evaporates, cooling the air and reducing its temperature. This cooled air is then circulated back into your living spaces.

Air Filters:

Air filters are an integral part of your air conditioning system, ensuring that the air circulating through your home is clean and free from contaminants. They trap dust, pollen, pet dander, and other particles, preventing them from being recirculated. Clean air filters are essential for maintaining good indoor air quality and system efficiency.

Understanding how these components function and their role in the overall cooling process will help you diagnose issues more effectively and make informed decisions when it comes to repairs and maintenance.

Man fixing ducted air conditioner.
Man fixing ducted air conditioner

Signs of Air Conditioning Issues

Perth’s hot seasons can put significant strain on air conditioning units, making it essential to be vigilant for signs of trouble. Identifying these issues early on can save you both time and money while ensuring uninterrupted comfort in your home.

Inadequate Cooling:

If you notice that your air conditioner is not cooling your home as effectively as it used to, this could be a sign of various problems. It might be due to a refrigerant leak, a malfunctioning compressor, or clogged coils. Reduced cooling efficiency can lead to discomfort, especially during scorching Perth summers.

Unusual Noises:

Unusual sounds coming from your air conditioner, such as grinding, squealing, or banging noises, should not be ignored. These noises can indicate issues with various components, including the fan, motor, or compressor. Prompt investigation can prevent more extensive damage.

Spike in Energy Bills:

A sudden increase in your energy bills, especially during the summer months, may indicate that your air conditioning system is working harder than necessary. This could be due to problems like refrigerant leaks, dirty coils, or a malfunctioning thermostat. Addressing these issues promptly can help you save on energy costs.

Poor Air Quality:

If you notice a decline in indoor air quality, with increased dust, allergens, or unpleasant odors, your air filters may be compromised. Clogged or dirty filters can no longer effectively capture airborne particles, leading to a decrease in air quality. Regular filter maintenance is crucial for a healthy living environment.

Repair Techniques for Compressor Issues

The compressor indeed serves as the heart of your air conditioning system, and understanding how to address issues with this critical component is essential for residents of Perth. When your compressor exhibits problems like overheating or failure to start, here are some detailed repair techniques to consider:

1. Diagnosis:

Diagnosing compressor issues is the first step in resolving problems. To effectively diagnose compressor problems:

  • Multimeter: Use a multimeter to check the electrical connections and continuity. Ensure that the compressor is receiving the correct voltage and that there are no electrical faults.
  • Professional Assistance: If you are unsure about using a multimeter or suspect a more complex issue, seeking professional assistance is advisable. Certified technicians have the expertise and equipment to perform a thorough diagnosis.

2. Cleaning:

Regular cleaning of your compressor is a maintenance task that can prevent minor issues from escalating. Dust and debris accumulation can hinder the compressor’s performance, leading to overheating and reduced efficiency. Here’s how to clean the compressor effectively:

  • Turn Off Power: Before starting any cleaning or maintenance, always turn off the power supply to your air conditioning unit to ensure safety.
  • Remove Debris: Gently remove any debris or loose particles from the exterior of the compressor unit using a soft brush or cloth.
  • Cleaning Coils: Inspect the compressor coils for dirt and grime. If you find buildup, use a coil cleaning solution and a soft brush to clean the coils carefully.
  • Safety Precautions: When cleaning, ensure you do not damage any components or electrical connections. Use recommended cleaning products and follow safety guidelines.

3. Replacement:

In some cases, a faulty compressor may require replacement. This is a more complex task that should be carried out by a qualified technician. Here’s what you should do:

  • Consult a Professional: If you suspect that your compressor needs replacement due to issues like loud noises, excessive overheating, or repeated failures, consult with an HVAC professional. They will assess the situation and, if necessary, recommend a suitable replacement compressor.

Remember that the compressor is a critical and expensive component of your air conditioning system. If you are uncertain about any repair work involving the compressor, it’s always best to seek expert guidance to avoid further damage and ensure the longevity of your AC unit.

Repair Techniques for Condenser Coil Problems

Perth’s hot summers mean that your air conditioning system’s condenser coils work tirelessly to dissipate heat. Addressing condenser coil problems promptly is crucial for maintaining efficiency. Here are effective repair techniques:

1. Cleaning:

Regularly cleaning your condenser coils is a fundamental maintenance task that can significantly impact your AC’s performance:

  • Turn Off Power: As with any maintenance, ensure the power supply to your AC unit is turned off before proceeding.
  • Remove Debris: Carefully remove leaves, dirt, and debris from the exterior of the condenser unit using a soft brush or cloth.
  • Clean Coils: Inspect the condenser coils for dirt and grime. If they are dirty, use a coil cleaning solution and a soft brush to clean them thoroughly.
  • Fin Comb: Straighten any bent or damaged coil fins using a fin comb to ensure efficient heat transfer.

2. Maintenance:

Annual maintenance by a professional is vital for keeping condenser coils in top shape, especially in Perth’s demanding climate. Here’s why maintenance matters:

  • Professional Inspection: A trained technician will inspect the coils, refrigerant levels, and overall system performance during annual maintenance.
  • Coil Coating: Some professionals may recommend applying a protective coating to the condenser coils to prevent corrosion and extend their lifespan.

Regular cleaning and professional maintenance will not only ensure the efficient functioning of your condenser coils but also contribute to the overall longevity and performance of your air conditioning system, particularly in Perth’s hot and demanding weather conditions.

Air Filter Maintenance and Replacement

Air filters play a critical role in ensuring good indoor air quality and maintaining the efficiency of your air conditioning system, especially in Perth’s dusty environment. Proper care of your air filters can help you breathe cleaner air and extend the lifespan of your AC unit.

1. Inspection:

Regularly inspecting your air filters is a simple yet effective practice. In Perth, where dust and allergens are prevalent, checking your filters is essential for ensuring optimal performance:

  • Frequency: It’s recommended to inspect your air filters at least once a month during heavy use seasons, such as summer in Perth.
  • Visual Inspection: Examine the filters for visible dirt, dust, and debris buildup. If you notice a significant accumulation, it’s time for maintenance.

2. Cleaning:

If your air filters are reusable, proper cleaning is crucial to maintain their effectiveness and extend their lifespan. Follow these steps:

  • Turn Off the System: Always turn off your air conditioning system before attempting to remove or clean the filters.
  • Remove Filters: Carefully remove the filters from their housing. Refer to the manufacturer’s guidelines for specific instructions.
  • Cleaning Method: Depending on the filter type, you can vacuum off loose dust or wash the filters with mild detergent and water. Be sure to allow them to dry completely before reinstallation.
  • Reinstallation: Once the filters are clean and dry, reinstall them according to the manufacturer’s recommendations.

3. Replacement:

For disposable air filters, timely replacement is essential to maintain system efficiency and indoor air quality. Here’s what you should keep in mind:

  • Schedule: Check the manufacturer’s recommendations for your specific filter type, but a common guideline is to replace disposable filters every 1 to 3 months.
  • Quality Filters: Invest in high quality filters that offer better filtration and a longer lifespan. Consider filters with a MERV (Minimum Efficiency Reporting Value) rating suitable for your needs.
  • Regular Maintenance: Make changing filters a routine part of your maintenance schedule to ensure your AC system operates at its best.

Proper air filter maintenance and replacement will not only keep the air in your home cleaner but also contribute to the overall efficiency and longevity of your air conditioning system in Perth’s challenging environment.

Man installing air conditioner in Perth - Everest HVAC & R
Man installing air conditioner in Perth Everest HVAC R
Man installing air conditioner in Canning Vale, Perth - Everest HVAC & R
Man installing air conditioner in Canning Vale Perth Everest HVAC R

Expert Tips for Air Conditioning Repairs

When it comes to repairing your air conditioning system in Perth, where the climate can be demanding, prioritizing safety and expertise is paramount. Here are some expert tips to keep in mind:

1. Safety First:

  • Power Off: Always turn off the power supply to your air conditioning system before attempting any repair work. This prevents electrical accidents and ensures your safety.

2. Handling Refrigerants:

  • Professional Handling: Refrigerants used in air conditioning systems can be hazardous. If you suspect a refrigerant leak or need to handle refrigerants, it’s crucial to rely on the expertise of certified technicians who are trained to handle these substances safely.

3. Professional Help:

  • Complex Issues: For complex or major issues, such as compressor replacement or refrigerant leaks, it’s best to seek professional assistance. Attempting these repairs without the necessary knowledge and equipment can lead to costly mistakes.
  • When in Doubt: If you are uncertain about any aspect of your air conditioning repair, don’t hesitate to contact a reputable HVAC professional in Perth. They have the experience and tools needed to diagnose and address problems effectively.

By adhering to these expert tips, you can ensure your safety, prevent costly errors, and maintain the efficiency and reliability of your air conditioning system, making your Perth home a comfortable oasis even in the hottest of seasons


In Perth’s climate, a well functioning air conditioning system is essential for comfort and health. By understanding the basics of your AC unit, recognising signs of trouble, and following repair techniques, you can keep your air conditioning system in top shape. Remember to prioritise safety and consult experts when necessary.