Eight Reasons Why Your AC Won't Turn On-And What to Do

Things can get stuffy fast when your air conditioner won't turn on in Canada. Thankfully, Service Experts Heating & Air Conditioning is here to help you keep your cool, even when your AC isn't functioning properly. Here are eight possible reasons why your air conditioner won't turn on and how to fix them.

1) Check the Thermostat

The easy explanation for your AC not turning on is a thermostat malfunction. Make sure your thermostat is on, set to "cool," and that the temperature is set to a few degrees cooler than the normal ambient temperature of your home. You will also sometimes need to replace the batteries. If that doesn't resolve the issue, the temperature sensor in the thermostat might be inaccurate. A thermostat that can't read the set temperature could keep your air conditioner from turning on. Once you've verified that the thermostat is faulty, it's time to replace it. If you can't decide on a thermostat that's right for your residence, speak with an Expert to help determine the best choice.

2) Check the Air Filter

Your air filter should be cleaned or replaced every 30-60 days at minimum. You should change them more often depending on the number of pets and people living in your home, and the local air pollution levels surrounding your residence. A dirty air filter can restrict airflow, causing your air conditioner to freeze and not turn on.

If your air filter appears dirty or you can't remember the last time you changed it, it's time to install a new one. If your AC was frozen, wait for it to thaw after changing the filter before turning it back on.

3) Check the Circuit Breaker

Open the electrical panel inside your home and try to see if the circuit breaker connected to your air conditioner is tripped. You can identify if the breaker is tripped if the switch has flipped to the "OFF" position. To resolve this issue, simply flip the breaker so that it's in the "ON" position.

If your AC continues to trip the breaker after fixing this issue, you may have a serious problem and should call the Experts at Service Experts Heating & Air Conditioning to stop it from damaging your home or air conditioner.

4) Check the Indoor Shutoff Switch

Often mistaken for a light switch, if your AC won't turn on, the indoor shutoff switch might have been flipped unintentionally. These switches are typically located near your furnace, in a closet, crawl space or attic. Once you locate the shutoff switch, confirm it's in the "OFF" position. If so, you’ll need to turn it back on. It's always a smart idea to label this switch to stop anyone from mistakenly turning it off.

5) Check the Outdoor Shutoff Switch

If you or someone else has recently serviced your air conditioner, they could have turned off the external shutoff switch as a safety precaution. First, locate the external shutoff switch, which should be near your AC unit. If the switch is in the "OFF" position, just flip it to allow your air conditioner to turn on.

6) Locate the AC's Reset Button

When your air conditioner won't turn on, it may simply need to be reset. Not all ACs have a reset button, so first find out if your unit does. If you can find the reset button, press it before trying to turn your AC on again. If you can't find the reset button, manually reset your air conditioner by shutting your thermostat off for five to 10 minutes before turning it back on again.

7) Inspect the AC for Ice Buildup

Look over the air conditioner for any icy buildup either on or inside the unit. If you come across ice on your machine, you need to wait for it to defrost before trying to start the unit or you risk damaging the AC. Though there are various reasons you might see ice on your air conditioner, it's always best to call Service Experts Heating & Air Conditioning for a consultation to keep further damage from occurring.

8) Ensure the Condensate Drain Isn't Clogged

If you don't come across ice on the air conditioner, the condensate drain could be backed up. When clogged, your AC won't turn on as a safety precaution. To resolve the issue, clear the drain line using suction from a wet/dry vac. Verify that you've fixed the blockage by pouring a small amount of clear water and watching it flow out. For particularly tough clogs, it may be best to call the Experts.

AC Still Won't Turn On? Call Service Experts Heating & Air Conditioning!

There's no reason to suffer without air conditioning—call your local HVAC Experts in Canada to help resolve why your AC won't turn on. Our highly trained technicians can troubleshoot why your unit isn't working, and complete a repair or install a replacement. And with Service Experts Heating & Air Conditioning, your satisfaction is guaranteed!*

Contact us at 866-397-3787 to schedule your air conditioning appointment in Canada today!

Contact Us