Why Is My Air Conditioner Not Working? 9 Amazing Reasons!

So why is my air conditioner not working? Your air conditioner is not working because of several factors.

One of which is because the batteries of your thermostat are broken. If that happens, then you should do something about it. Or maybe, you just forget to turn on the switch. It all depends, my friends.

why is my air conditioner not working

The thing is that we cannot get rid of not working air conditioners. So before you take your unit to a professional, examine and inspect. And yes, to bring your unit to a professional is costly. Thus, you need to take care of it.

In order to know more about these possible reasons, keep on scrolling.


Why Is Your Air Conditioner Not Working?

To answer your question: why is my air conditioner not working? Here are the following reasons:


Reason #1. Broken batteries in your thermostat

Sometimes if your air conditioner is not working, it does not mean that you have a broken unit. However, broken batteries could be the possible reason. For example, the reason your thermometer is not displaying something is that the batteries are dead. To solve this problem, you need to buy new batteries and replace the old ones.

When the screen of your air conditioner is empty, replacing the thermostat batteries must be your first option. Of course, you could call a heating, ventilation, and air conditioning (HVAC) company to repair it, but it would cost you a lot.  Moreover, ensure that you set the temperature on your thermostat to cool.


Reason #2. You forgot to on the indoor disconnect switch

If the indoor disconnect switch is in your basement or storage room, you will most likely forget to turn it on. This problem is something that commonly occurs.

Before proceeding with any further troubleshooting, ensure that turn on the indoor disconnect switch. This little action might be the only answer to your problem.


Reason #3. Clogged filters

One of the most prevalent sources of air conditioner problems is clogged or blocked filters. Air conditioner filters can become clogged by dust, hair, and other tiny particles that can go inside the filter.

When air conditioner filters get blocked, they impede the passage of air across your air conditioner. As a consequence, your air conditioner is unable to chill your home.

In addition, blocked filters might cause problems to your unit’s interior evaporator coil and the outdoor condenser. Cleaning and replacing clogged filters is the best step to prevent these kinds of problems.

Remember to replace them at least every three months. Filters may need to be changed more frequently if you have pets.


Reason #4. Stumbled circuit breaker box

Inspect the breaker box in your house. It could be the one that links to your heating and cooling system. Thus, you need to reset it and test the air conditioner once more. The circuit breaker box frequently trips when overload happens.

If the breaker breaks again, turn off any other machinery that might be creating trouble. However, you do not know what to do or are scared to touch it, contact an HVAC specialist to identify the problem.


Reason #5. Blown fuse

Technically, you may have broken two fuses: the one linked to your thermostat and an interior fuse if your air conditioner is not working. In any case, a broken fuse connecting your air conditioner and your thermostat is similar to a broken engine in your automobile.

Before the mechanism can work, you need to replace it. Therefore, it is advisable to contact heating and cooling professionals to resolve the issue instead of yourself.


Reason #6. Filthy indoor and outdoor coils

Sometimes, when you are set your thermostat into a cool status, the air that comes out of your pipes is not cool as you expected. It is because you have clogged and dirty coils in your air conditioner. There are two air conditioner coils in your system: the exterior and the interior.

If you don’t get your heating, ventilation, and air conditioning (HVAC) system maintenance constantly, they might become filthy. The unit will be unable to dissipate heat from your house over time. Instead, your air conditioner will merely circulate air that is roughly the same warmth as your environment.


Reason #7. Leaking refrigerant

Refrigerant or coolant is a chemical substance that transports energy from an interior environment to the outside. It is usually present in air conditioners.

Puron and Freon are two forms of coolants that chill the air in your air conditioning system. Your air conditioner may have trouble cooling your house if the refrigerant levels are too low.


Reason #8. The compressor doesn’t work

The compressor in your air conditioner is the beating heart of the unit.  Throughout the inside and outdoor systems, the compressor distributes refrigerant.

When the compressor fails to do its job, the overall system fails to cool your home. For instance, you need to replace the inductor or other complicated mechanism that maintains the compressor running.


Reason #9. Your air conditioner experience overheating

The primary reason you bought an air conditioner was to avoid the sun’s heat and cool yourself. If the sun shines directly on the thermostat of your air conditioner, the heat might cause the air conditioner to overheat and cause issues.

To minimize the heat impact on your house on scorching days, retain your blinds drawn.



There are nine common reasons why your unit is not working. You should check and examine before contacting an expert. Regular check-up is a must to prevent problems. I hope I answered your question: why is my air conditioner not working?

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