Just think about it, you just got home after spending your entire day at home. As soon as you get back, you turn on the air conditioner hoping to create a friendly and comfortable environment indoors. However, your air conditioner causes humidity levels to rise. It turns out that your air conditioner is blowing hot air indoors. This is one of the many signs that you need call air conditioning repair services.

Some troubleshooting tips for you

There can be many reasons why your air conditioner is not cooling the house and instead, it is releasing hot air. In this article, we have put together some tips that you can use to troubleshoot your air conditioner or other HVAC equipment.

Check the thermostat

This is the very first, and perhaps, the most important tip that you should remember. The best place to start is to check the thermostat. You should make sure that the thermostat is working properly and that its settings are correct.

Sometimes, the settings end up getting messed without you purposely doing it. As a result of this, the performance of your air conditioner will decrease because it will trip much earlier. Furthermore, if the thermostat has gone faulty, you can expect the same.


Refrigerants are responsible for the heat transfer in your air conditioner. If the refrigerant is not working properly, your air conditioner will not cool the indoors effectively. Sometimes, air conditioners go low on refrigerants due to leakages. However, this is something that you should not attempt to fix on your own. That is because these chemicals are quite dangerous and hazardous. Only licensed HVAC contractors should handle them.

Furthermore, if you try to fix the problems with the refrigerants in your air conditioner on your own, you may end up causing more problems. Since refrigerants in air conditioners rely on a closed loop system, it is likely that the system is faulty at some other end.

Dirty filters

Another common reason why air conditioners blow hot air inside are dirty filters. They are extremely important for the proper functioning of your air conditioning systems even though they may seem insignificant at first. Filters help keep out the dust, airborne contaminants, and dander from entering your indoors. This prevents allergies and other dust related issues. However, if your air filter gets dirty, then your air conditioner will have to work harder to blow air through it.

This can significantly reduce the air flow from your air conditioner. If the clogs become thicker, then your air conditioner will start releasing hot air inside, resulting in an uncomfortable environment. So, take a quick look at the filters of your air conditioner.

If they are clogged, just remove them gently and remove the dust. This is something that you can do on your own. After all, it does not require technical knowledge. Removing air filters from inside the air conditioner is quite straight forward and easy in most of the cases.

Frozen coil

Another problem that can cause your air conditioner to release hot air is frozen air conditioner coil. When the evaporator coils end up freezing, the refrigerant in your air conditioner is unable to absorb the heat from the outdoors. As a result of this, the air conditioner starts blowing hot air from the outside and you will not be able to achieve the right indoor temperature.


We hope that you have noted all the problems that can cause your air conditioner to blow hot air inside your house. While you can solve some of these on your own, you may sometimes need AC repair services Vienna for the more complex issues.

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