Green Leaf Air

by Rifat A. in Blog 1 comment

A right-sized home AC unit can keep you and your family cool in extreme weather. Suppose it’s 100 degrees Fahrenheit outdoor. You tried to turn on your AC. But it’s not running. You’re wondering, “Why won’t my AC turn on?”. You may think there is a problem with your power supply. So, you tried to turn on your air conditioning unit a few times, but still, your AC isn’t turning on. You realized it’s not a problem with the power supply or wiring. Don’t panic. Today, I’ll talk about why your unit isn’t turning on and what does the reset button on the AC unit outside do. Also, we’ll talk about why do you need regular check-ups and air conditioning maintenance service to keep it at its best.


5 Reasons Why Won’t My AC Turn On

1.     Tripped Circuit Breaker Panel

The circuit breaker inside is designed to protect electrical appliances, including an air conditioning unit from high voltages. It is connected to the main electrical panel and protects appliances by triggering an immediate shut down by disconnecting the breaker when a high voltage current passes through it. It keeps your home safe from fire.

Apart from high voltage current, using multiple electrical appliances at the same time, can cause this problem. With an old air conditioner system, you’ll face this problem as well.

To solve this problem, you’ll need to make sure that all your electrical appliances are in good condition. Check yourself or call experts. Also, if your air conditioning system is more than 10 years old, you should replace it as soon as possible. Because when the air conditioner gets old, it starts to consume more electricity and cause this problem frequently.

2.     Not Changing the Air Conditioner Air Filter Regularly

When your air conditioning unit has a clean air filter, it’ll absorb the vapor from the air and start to accumulate in the drain line. But when the air conditioner air filter is dirty, water droplets will start to freeze, and eventually, it’ll freeze the condenser coil and drain line of the air conditioner. As a result, your air conditioning unit won’t start.

That’s why you’ll need to change your air conditioner air filter regularly. The ideal time for changing an air filter is between 2 and 3 months. But to know the exact time, you should consult with HVAC professionals near you who offer AC repair service. He will check and see if your filter requires immediate changing. He’ll also recommend the right time interval to change the AC air filter.

3.     Clogged Evaporator Coils of the Air Conditioning Unit

Evaporator coil is usually in the outdoor unit of home AC unit and it gets dirty very quickly. It reduces the overall efficiency of the air conditioning unit, and eventually, it leads to system failure.

That’s why I’ll recommend you to clean the outdoor unit of the air conditioner system. The best way to keep your AC system in good condition is by doing a regular maintenance. When you do regular maintenance, all air conditioner parts will be in good condition. Besides, when you take AC maintenance checkup service by a local expert heating and cooling service professional, he will clean all your AC parts.

4.     Malfunctioning Motor

If you have heard unusual noises coming from your AC unit before being certain that your outside AC unit won’t turn on, check the motor – make sure it is not just the motor. There is a high chance that your AC has a malfunctioning motor problem. To know if it is malfunctioning or not, you’ll need to do the capacitor test. Call Us, if you need professional expertise.

5.     Broken Thermostat

A Thermostat is an integral part of any heating and cooling system. It controls the temperature of an air conditioner, and that’s why it is called the brain of an AC. But if your AC has a bad thermostat, your air conditioner won’t start or power on. It may also cause other HVAC problems.

However, you can test your AC thermostat inside your home by yourself. You can also take help from an HVAC professional who offers this service. Again, if you haven’t changed your AC thermostat in 7 to 10 years, you should switch to a smart thermostat, even though it doesn’t cause any problems. A smart thermostat will allow you to set the temperature according to your schedule and save you big bucks in electric bills and in AC Service or repair costs.


See the summary of this part here – 5 Reasons Why Your AC Won’t Turn On…


5 Reasons Why Your AC Won’t Turn On
5 Reasons Why Your AC Won’t Turn On


How to Reset AC Unit Outside

When you know how to reset the air conditioner unit, you can get rid of a few problems easily. For example, when there is a power outage, your AC unit may not become fully functioning due to a circuit breaker. In this case, if you know how to use the reset the air conditioner, you’ll be able to turn on your air conditioner quickly.

Step 1: Find the Reset Switch

To reset your air conditioner, you’ll have to first find the reset button of the outside unit. But if you’re wondering where is the reset button or switch on the air conditioner unit, look for a small and red button or switch on the air conditioner. If you don’t find any reset button, your AC probably doesn’t have one, and to reset your air conditioner, you’ll have to do it manually.

Step 2: Unplug the AC Power Switch

Next, after finding the reset button, it is time to unplug the AC system. Look for the plug near the AC and if you still don’t find it, take help from the manual. Wait for 10 to 15 seconds and plug it back in.

Step 3: Hold the Reset Power Switch

After plugging in, hold the reset switch box for like 3-5 seconds. If the AC doesn’t reset or work, follow the steps again and try to turn on the switch.


When You Don’t Have an AC Reset Button

Step 1: Find the 240-Volt Circuit

Now find the 240 V circuit power supply electric board. You’ll see it in the main electrical panel of your home. After finding the circuit, turn it off.

Step 2: Wait and Turn the Circuit Breaker On

Next, turn off the circuit, wait for 20-30 minutes, and set to cool. At this point, it should start to cool your home back like it used to. After waiting and cooling down your air conditioner, turn it back again. It should now start working properly, but if for some reason, it is not running, get an HVAC expert who will check it make sure it is working properly. You should also call them for AC service if your unit shut down repeatedly.



As soon as you notice that your air conditioner isn’t turning on or the power button is not working, you should call a heating and cooling professional. A little delay in air conditioner repair can cost you big bucks. Besides, delay in AC servicing can lead to system shutdown.

Again, if you need to reset your air conditioner, you can follow the tips and steps I described above. However, if you need to reset your AC and but you’re comfortable in handling an AC, you should call a nearby professional for AC service. Always remember, safety is above all, and try to take help when it’s needed. So, for your HVAC Duct Cleaning, air conditioning repair and compressor repair needs, call us at 972-992-5006.

Rifat A.

HVAC Expert, Author & Mathematician... rifatahmed.com

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