As of 2020, almost 90% of homes in the US used air conditioning, and when you’re in the hot summer sun of Texas, you want your air conditioning to be working the way it should be.

If your AC won’t turn on, sometimes, it’s a quick fix that you can handle at home, so you’ll need to know what to check for. But other times, you’ll come across a problem you can’t fix on your own. In these cases, you’ll need to know when you should call in a professional air conditioning service to help you.

To learn more, keep reading this guide to learn five reasons why your AC won’t turn on and what you can do to fix the problem!

1. Clogged Air Filter

If you don’t remember the last time you changed your air filter, you’ll need to check this first. This is a common AC maintenance task that many people forget to complete.

Air filters can get clogged up with debris and dust, which blocks the airflow causing the coils in your AC to freeze and form ice. This causes your AC to stop cooling your home completely, and if your AC is frozen enough, it won’t turn on at all.

Eventually, your AC will not be able to draw air, which causes it to heat up and melt the ice on the coils. In this case, you might also notice that your air conditioner is leaking.

You’ll need to make sure to change your air filter every 90 days. In addition, you should change your air filter every 30 to 45 days if you have allergies or pets in your home to improve your indoor air quality.

2. Thermostat Problems

Your thermostat is essentially the main communicator to your air conditioner, so if it’s not working correctly, your AC won’t sense when to switch on properly. 

You’ll first need to look at your thermostat’s screen. If it’s off or no numbers are displaying, then try to switch it on. If it doesn’t switch on, your next step will be to replace the batteries.

You may need a new thermostat if it still doesn’t switch on after you replace the batteries. Your next step should be to call a professional technician to come and evaluate the problem. Professional AC companies will be able to determine if it’s an electrical issue or something else and fix the problem immediately.

3. Clogged Condensate Line

Air is either cooled or heated through your HVAC system, and the humidity gets released. The humidity will eventually turn into condensation, which then drains through your condensate line.

The condensate line is also in an enclosed damp space, so it’s susceptible to mold and mildew. If you don’t flush your condensate regularly, it can become clogged, and eventually, your AC won’t turn on.

To troubleshoot, you’ll first need to turn your AC off from both the breaker panel and thermostat. Then, you’ll need to go outside to find the PVC pipe that’s closest to the outer part of your air conditioner. Remove the cap, pour a cup of distilled white vinegar into the pipe, and let it sit for an hour before flushing with water. You should repeat this process once a month.

If you don’t feel comfortable doing this, you should Google “AC repair near me” and call in the professionals to ensure it’s fixed properly.

4. Refrigerant Leak

If you know what to look for, you’ll be able to detect a refrigerant leak before your AC won’t turn on. You’ll notice that while your AC is running, it’s not cooling your home effectively. You’ll also notice your AC bills going up for no reason, a hissing sound from your AC, or warm air coming from your vents. 

The freon in your AC is an odorless and tasteless gas that can cause reduce the oxygen levels in your lungs and can lead to refrigerant poisoning. Therefore, if you suspect a refrigerant leak, it’s essential to take it seriously and take action immediately.

Due to the dangers, the Environmental Protection Agency only allows certified technicians to handle these types of refrigerant problems. So, you’ll need to call a licensed HVAC professional to come and fix the issue.

5. Blown Fuse

Frequently, a blown fuse is the reason your AC won’t turn on, so it’s something you’ll need to remember to check when you’re troubleshooting. Your first step is to ensure you turn off your air conditioner and power supply to avoid electrocution. 

Next, locate the fuse box and pull out the fuses for your AC. You’ll need to do what’s known as a continuity test using a multimeter. A multimeter is a small handheld device that measures electrical voltage, and you can find them at most home retail stores.

If you find that a fuse isn’t working, you can purchase a new one at your local hardware store. You’ll need to ensure you get the model and make of the fuse or take a picture of it to have with you.

If you’re not comfortable doing this, it’s best to call an AC repair service to help you fix the problem.

Call a Professional AC and Heating Service When Your AC Won’t Turn On

Now that you know the most common reasons why your AC won’t turn on, you’ll more easily be able to do some troubleshooting at home first.

If you don’t feel comfortable working on AC equipment you’re not familiar with, look up “heating and cooling near me” on Google until you come across P & M Air Conditioning and Heating.

We offer AC and heating services, heating and cooling maintenance, air quality checks, and installation services. We’re a family-owned business with over 65 years of experience, and our service areas include Houston, Bellaire, Pearland, West University, and Friendswood, TX.

We’re available 24/7, so make sure you contact us today to schedule an appointment!