AC Won't Turn On? Here's What You Need to Know

As the summer heat rolls in, it’s important to make sure your air conditioning system is functioning properly. One of the most frustrating issues homeowners can experience is an air conditioning unit that won’t turn on. 

In this article, we’ll explore some of the potential causes of this problem and offer solutions to help you get your AC unit back up and running. 

The good news? There are experts that are more than happy to provide assistance.

It’s always easier when you can reach out knowing a bit about what’s going on with your appliance. We’ve detailed the possible and probable causes of why AC won’t turn on in your home. This can help you understand the issue and know exactly when to call in the cavalry.

Continue reading to learn more.

5 Possible Reasons Why Your AC Won’t Turn On

There are several potential reasons why your AC unit may not be turning on. Here are some of the most common issues:

  • Thermostat Problems: Your thermostat controls your AC system, and if it’s not working correctly, your AC may not turn on. Check your thermostat batteries and settings to make sure they are working properly.
  • Electrical Issues: Your AC unit requires a steady supply of electricity to function correctly. If there’s an issue with your electrical panel or wiring, your AC unit may not turn on at all. 
  • Clogged Air Filter: A dirty air filter can cause your AC unit to overheat, which can prevent it from turning on. Check your air filter and replace it if it’s dirty.
  • Tripped Breaker: A tripped breaker can cause your AC unit to turn off. Check your electrical panel for any tripped breakers and reset them if necessary.
  • Low Refrigerant: If your AC won’t turn on, it may be due to low refrigerant levels. Low refrigerant levels can cause your AC unit to stop working correctly. If you suspect low refrigerant levels, contact an HVAC professional to recharge your system.

The important thing to keep in mind is that, while AC does offer a whole world of benefits in the scorching summer, the repair process is best left to the pros. Trusted HVAC technicians ensure your safety and the safety of your home, allowing you to avoid risks while embracing a breath of cool air.

AC Unit Not Turning On: How to Tell

If you’re experiencing issues with your air conditioning unit not turning on, there are a few things your technician can do to troubleshoot the problem. Here’s how to tell if your AC unit is not turning on:

  • Check Your Thermostat: Make sure your thermostat is set to the right temperature and mode. It should be set to cooling.
  • Check Your Circuit Breaker: If your AC unit won’t turn on, check your circuit breaker panel to see if the breaker has tripped. If it has, reset it and try turning on your AC unit again.
  • Listen for Sounds: If your AC unit is making strange noises or not turning on at all, you may have an issue with your blower motor or compressor.
  • Check the Air Filter: A clogged air filter can cause your AC unit to overheat, which can prevent it from turning on. An AC pro can check your air filter and replace it if necessary.

This information can help when you make a service call. Equipping yourself with information is the best way to find help efficiently. Professional HVAC experts are trained to address many issues and provide you with the most reasonable solutions possible. 

Fan on AC Not Spinning Correctly: 3 Reasons Why

If your AC unit is turning on, but the fan is not spinning, there could be a few causes. Here are some things that your technician can check:

  • Faulty Fan Motor: A faulty fan motor can prevent your AC unit from blowing cold air. If you suspect a faulty fan motor, contact an HVAC professional for assistance.
  • Loose Fan Belt: A loose fan belt can cause the fan to stop spinning. A technician can check the belt and tighten it if necessary.
  • Blocked Fan: A blocked fan can prevent air from flowing through your AC unit. A tech can check for any debris or dirt around the fan and clean it if necessary.


While it’s handy to know what’s going on with the mechanics of your appliance, professional help is necessary.                             

Is Your AC Not Turning On? Contact a Professional

If you’re experiencing issues with your AC unit not turning on, here are some reasons why you should contact a pro:

  • Contact an HVAC Professional: Once you’ve tried unplugging it and plugging it back in, if it still won’t turn on, it’s time to contact an HVAC professional. They can diagnose the issue and provide you with the necessary repairs to get your AC unit up and running again. 
  • Check Your Thermostat: Make sure your thermostat is set to the right temperature and mode (cooling). If the display is blank, you may have an issue with your thermostat.
  • Check Your Circuit Breaker: If your AC unit won’t turn on, check your circuit breaker panel to see if the breaker has tripped. If it has, reset it and try turning on your AC unit again.
  • Check Your Air Filter: A dirty air filter can cause your AC unit to overheat, which can prevent it from turning on. We check your air filter and replace it if necessary.
  • Check Your Condenser: If your AC unit is not turning on, the condenser unit may be malfunctioning. Our team can check the condenser for any signs of damage or debris and clean it if necessary.

Reach Out to The Experts at IMS Heating & Air for Help

While some AC unit issues can be solved with a quick reset, most require the expertise of an HVAC professional. If you’re experiencing issues with your AC unit not turning on, don’t hesitate to contact the IMS Heating & Air team today for help. 

We’re ready to diagnose the issue and provide you with the necessary repairs to keep your home comfortable during the hot summer months.