9 Reasons AC Not Turning On & How To Fix Them

Do you know why your Air Conditioner Won’t Turn On?

If your AC not turning on and you do not know why you are having air conditioner problems nor how to fix them, this article may just be what you have been looking for.

Today we will discuss the 9 biggest reasons like faulty motors, burnt fuses or tripped circuit breakers that may be causing your AC system to not be turning and as well as some AC repairs you can perform to get your heating and cooling air unit up and running again, especially in the hot summer months.

Discussed below are the most common reasons why your air conditioner may completely fail to turn on.

For a look at the most common fix for when your air conditioning unit won’t turn on, be sure to watch the following video:

Common Reasons Your AC Unit Is Not Working Properly

1. Tripped Circuit Breaker

The circuit breaker is usually designed to actually shut off when there are power fluctuations and in particular when they are receiving an electricity overload. This is usually a very good role as they are able to prevent and protect homes from fires. 

One reason that results in the circuit breaker being tripped is if you are using too many appliances that are connected to a single power source all at ago, or otherwise, you are using an appliance that is too old and broken making it use too much electricity.

In case of whichever reason, if the breaker that provides power to your air conditioner unit trips, the AC will not turn on at all. What you need to do if this happens is simply resetting the breaker.

2. Blown Fuses

In order to know if your fuses are functioning in a proper manner, you will need to have a multi-meter which will help you do a continuity test. You will have to test both fuses. If the multi-meter produces a beeping sound, then your fuses are functioning properly. 

If you find out that one of the fuses does not generate the beeping sound, then it is blowing and it could be the main cause of your AC not turning on. In order to fix this issue, you will have to purchase a replacement for the switch from a hardware store.

3. Clogged Air Filters

You really have to ask yourself how often you normally change the air filters. Many individuals know that this is an activity that needs to be regularly done but many tend to forget about it and this results in the AC having several problems. 

What you should know is that a clean airflow is usually acquired if the filters are clean as well. The moment they are embedded with dust and debris, the airflow is obstructed completely.

Under normal circumstances, an air conditioner will be able to absorb humidity from your home. What happens next is that water droplets will be seen falling into the condensation tray and then be drained outside through the drain lines. 

However, if the air filters are dirty, the water droplets will completely freeze and this will mean they are covering the coils with a layer of ice.

What you need to do in order to fix this issue is to change your filters regularly and this will ensure your air conditioner operates efficiently.

4. Dirty Evaporator Coils

Dust particles, dander, and dirt as well as additional materials that have embedded around the evaporator condenser, coils or filters within your AC easily and quickly. The reality is, your air conditioner is full of components that are susceptible to debris building up. 

The moment the debris builds up on several components of your air conditioner, it makes the system to become less efficient and can ultimately lead to a total breakdown of the system. The best thing you can do to avoid this problem is by scheduling regular air conditioner maintenance.

5. Dirty Condensor Lines

One thing you should know is that the same way the air filters get dirty is equally the same way the condenser lines get filled up with dirt. Over time, algae and mold will grow on them. In most cases, you may find a bird or a rodent making it an ideal location to set up its shop.

The best thing you can solve this issue is by locating the Air conditioner condenser unit right outside your home, lifting the lid and using wet clothing which is distilled with vinegar to completely clean up all the debris inside.

 Before you get down to this activity, ensure you have hit the shut-off switch to turn off the power. This is not difficult and you should be able to do it in just a few minutes.

6. Refrigerant Leak

You should clearly understand that refrigerant is a coolant. This said, however, one should know that it should not be added on a regular basis because it is meant to last for a long time. If the air conditioner is not working efficiently, then there is no need to add refrigerant. 

You will realize that if you have a Freon leak, your air conditioner will not function as it should be. This could even cause refrigerant poisoning in the house.

The only way to fix this issue is to hire a certified HVAC technician who is well aware of the proper solution to this kind of problem.

7. Broken Motor

If your air conditioner happened to be producing some annoying sounds before it completely stopped working, it could be a problem with your motor. The only way you can check if your motor can still work is by doing a capacitor test.

If you find out that your motor has some problems, you should contact your HVAC contractor who will be able to asses it and administer a long-lasting solution to your air conditioner.

8. Electric Wiring Issues

We all know that there are many problems associated with electric wiring in your home. This can actually be the issue that is causing you AC not to turn on at all. These underlying issues that you find lights flickering, or humming sound when you plug in an appliance. 

If these things happen in your house you need to hire an electrician to fix the house wiring. If these issues have affected your AC, you will need the help of an HVAC contractor to help you out.

9. Faulty Thermostat

The thermostat is one of the most critical parts of your air conditioner. If your thermostat is broken, your AC may surely not turn on at all. What you can do to confirm this is testing the thermostat by yourself. If it is broken, you need to hire an HVAC contractor to fix it.


Now that you know the most common problems that could be causing your air conditioner to not turn on as well as how to fix them, the next time your AC unit stops working you will know how to confidently handle it. 

If you would like some more information on common heating and air conditioning problems as well as how to find the best HVAC companies in your area to fix them, be sure to read the following related articles.

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