Why Your Air Conditioner Blows Hot Air And What To Do About It?

Imagine coming back home on a hot, sunny day, looking forward to enjoying the cool breeze from your air conditioner, only to be met with an unexpected blast of warm air. Frustrating, isn’t it?

We rely on our air conditioning units as they are our cool companions during scorching summers, making this unexpected twist all the more aggravating. Homeowners often find themselves pondering, “Why is my aircon blowing hot air?” This is precisely what a malfunctioning air conditioner does!

To comprehend and address this issue of the aircon blowing warm air, continue reading this blog post.

Importance of having a functional AC

When the mercury starts climbing up, having a working air conditioner becomes more than just a luxury; it is your reliable ally in the battle against heat. A functional AC takes charge of the air quality in your space, kicking out dust and allergens. It acts as a guard against health-related issues and also helps you have a solid night’s sleep.

Thus, a functional air conditioner will help you beat the heat and create an environment conducive to your well-being and productivity when the temperature is doing its best to be the spoilsport. So, consider your AC more than just a cooling machine.

Common Causes of AC Blowing Hot Air

Identifying the reasons behind your air conditioner’s unexpected switch to blowing hot air can feel like solving a puzzle. It’s a scenario that no one welcomes, especially during the peak of summer. However, understanding the common causes can be your first step toward regaining the cool haven you crave. Let’s unravel the reasons behind the warm breeze and explore the factors that might be disrupting the chill in your air conditioner.

Lack of Power Supply 

A common culprit for your aircon blowing hot air could simply be a lack of power supply. Check the power source – ensure your AC unit is plugged in and the circuit breaker hasn’t thrown a tantrum. Sometimes, the solution is just a slip of a switch away. It is like giving your air conditioner the energy boost it needs to get back on track and rescue you from the heatwave blues.

Refrigerant Issues 

The refrigerants are the unsung heroes behind your air conditioner’s cooling prowess. Your air conditioner just blowing hot air might be signalling a refrigerant-related hiccup. Low refrigerant levels or potential leaks could be the culprits. When these agents operate below optimal levels, the system’s efficiency is compromised.

Thermostat Malfunctioning

Changed air conditioner’s temperature and still find the air con blowing hot air? The issue here might lie in the thermostat. When your air-con is not blowing as expected, it can be due to incorrect settings or a malfunctioning thermostat. It is like your AC does not understand what you want in terms of cooling. This is why it is important to check the settings.

Airflow obstructions 

Blocked pathways can significantly disrupt your air conditioner’s performance. Another reason behind your AC blowing hot air instead of cool can be because of potential airflow obstruction. Consider your AC as an expert in managing air circulation, but blocked filters or vents can hamper its effectiveness. Addressing these obstructions is essential to ensure optimal functioning and restore your air conditioner’s cooling capabilities.

Read Also: How To Select The Best Air Conditioner For Your Home

Step-by-step troubleshooting guide:

To identify and solve the AC issue, we have compiled a list of steps so that you can have your optimally functioning air conditioner back:

1. Check the thermostat setting:

Ensure the thermostat is set to the desired temperature, in “cool” mode, and replace thermostat batteries if needed. This will help you ensure your aircon is not blowing hot air.

2. Inspect the air filter:

Locate and clean or replace the air filter if it is dirty; you can also consider upgrading to a higher-efficiency filter.

3. Examine the circuit breaker:

Find and reset any tripped breakers related to the AC unit; seek professional help if the issues persist.

4. Asses the condenser unit:

Clear debris around the outdoor condenser unit and check for damaged coils or fins.

5. Verify refrigerant levels:

Check the refrigerant levels with the help of a professional. Doing this will help you identify any leaks promptly; thus, you can ensure that your aircon is not blowing hot air.

6. Examine the evaporator coils:

Check indoor coils for dirt or frost, clean them if needed, and note any signs of refrigerant problems.

7. Inspect the ductwork:

Look for leaks, disconnected sections, or blockages; seal leaks or seek professional assistance.

By following this concise guide and employing DIY inspection techniques, you can resolve common AC issues. However, for persistent problems, consult a professional HVAC technician for a thorough assessment and repair.

Professional Help and When to Seek It

When facing persistent AC issues, like AC blowing hot air, it is crucial to recognise indications showing that professional assistance may be necessary. If DIY troubleshooting fails to resolve the problem or if you notice signs such as unusual sounds, refrigerant leaks, or repeated tripping of the circuit breaker, seeking the expertise of a professional air conditioning repair service in Brisbane becomes imperative. Don’t let the frustration of a malfunctioning AC persist; enlist our services for reliable, prompt, and professional air conditioning repair in Brisbane. 


Identifying and promptly addressing the root cause is crucial for a cool and comfortable living space. Regular maintenance is key to preventing such problems, and our dedicated team is here to provide expert solutions for all your needs concerning air conditioning repair in Brisbane. Contact us today at 0428 149 923 for a reliable service and a consistently cool and refreshing indoor environment.