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

Things can get uncomfortable fast when your air conditioner won't turn on in San Antonio. Thankfully, San Antonio Air Service Experts is here to help you remain cool, even when your AC isn't running properly. Here are eight typical reasons why your air conditioner won't turn on and how to fix them.

1) Check the Thermostat

The simplest explanation for your AC not turning on is a thermostat issue. Double check your thermostat is on, set to "cool," and that the temperature is set to a few degrees lower than the normal ambient temperature of your home. You will also sometimes need to replace the batteries. If that doesn't solve the issue, the temperature sensor in the thermostat might be inaccurate. A thermostat that can't read the set temperature could stop your air conditioner from turning on. Once you've learned that the thermostat is malfunctioning, 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 exchanged every 30-60 days at minimum. You should change them more often depending on the number of pets and people living in your home, plus 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 resolving this issue, you might have a serious problem and should get in touch with the Experts at San Antonio Air Service Experts to prevent 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 may have been flipped accidentally. These switches are typically found near your furnace, in a closet, crawl space or attic. Once you locate the shutoff switch, check to see if it's in the "OFF" position. If so, just turn it back on. It's always a smart idea to label this switch to keep anyone from mistakenly turning it off.

5) Check the Outdoor Shutoff Switch

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

6) Identify 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 verify if your unit does. If you can find the reset button, push it before trying to turn your AC on again. If you can't reach the reset button, manually reset your air conditioner by switching 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 discover ice on your machine, you need to wait for it to defrost before attempting 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 smartest to call San Antonio Air Service Experts for a consultation to keep further damage from occurring.

8) Ensure the Condensate Drain Isn't Clogged

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

AC Still Won't Turn On? Call San Antonio Air Service Experts!

There's no reason to suffer without air conditioning—reach out to your local HVAC Experts in San Antonio to help determine why your AC won't turn on. Our fully trained technicians can diagnose why your unit isn't working, and complete a repair or install a replacement. And with San Antonio Air Service Experts, your satisfaction is guaranteed!*

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

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