Why Is My AC Not Turning On?

Air conditioner outside beside a home, illustrating common issues for why your AC is not turning on. Always Affordable HVAC and Plumbing offers expert AC repair and HVAC services in Sacramento, Roseville, and Folsom to diagnose and fix problems such as power supply issues, clogged air filters, and malfunctioning capacitors. Keywords: AC not turning on, air conditioner problems, HVAC repair, AC troubleshooting, Always Affordable HVAC, Sacramento AC repair, Roseville AC services, Folsom HVAC solutions, clogged air filter, malfunctioning capacitor. AC Repair Sacramento, AC Repair Elk Grove, AC Repair Roseville, AC Repair Davis, AC Repair Rancho Cordova, AC Repair Folsom, AC Repair Citrus Heights, AC Repair Rocklin, AC Repair West Sacramento, AC Repair Lincoln, AC Repair Woodland, AC Repair Carmichael, AC Repair North Highlands, AC Repair Fair Oaks, AC Repair Orangevale, AC Repair Rio Linda, AC Repair Galt, AC Repair Granite Bay, AC Repair Antelope, AC Repair Auburn, AC Repair Elverta, AC Repair Wilton, AC Repair Loomis, AC Repair Winters, AC Repair Newcastle, AC Repair Mather, AC Repair McClellan, AC Repair Penryn, AC Repair Represa, AC Repair Herald, AC Repair Sloughhouse, AC Repair Yolo

Why Is My AC Not Turning On?

Troubleshoot an AC Not Turning On 

Is your air conditioner failing to start when you need it most? Dealing with a malfunctioning AC unit can be particularly frustrating, especially during hot summer days. Before seeking professional help, consider taking several troubleshooting steps to diagnose and potentially resolve the issue of your AC not turning on.

Tips for an AC Not Turning On

Check the Power Supply 

First things first, ensure that your AC unit is receiving power: 

  • Inspect the Thermostat: Make sure the thermostat is set to cool and is set below the current room temperature. If it has batteries, replace them to ensure they aren’t the issue. 
  • Check the Circuit Breaker: Head over to your electrical panel and check if the circuit breaker that controls your AC unit hasn’t tripped. Reset it if necessary. 
  • Inspect the Power Switch: Outdoor units often have a disconnect switch located near the unit. Ensure it’s turned on. 

Examine the Air Filter 

A clogged air filter can restrict airflow and cause your AC to malfunction: 

  • Locate the Air Filter: Check your air filter located inside the air handler or furnace. If it’s dirty, replace it with a new one. A clean filter ensures proper airflow and prevents strain on the system. 

Inspect the Condensate Drain Line 

A blocked condensate drain line can cause your AC to shut down: 

  • Find the Drain Line: Locate the condensate drain line, usually near the indoor air handler. Ensure it’s not clogged with dirt or algae. If clogged, clear it using a wet/dry vacuum or by pouring a mixture of bleach and water through it. 

Check the Capacitor 

The capacitor helps start the AC’s motors and can fail over time: 

  • Locate the Capacitor: Consult your AC unit’s manual to locate the capacitor. Check if it looks swollen or shows signs of damage. A faulty capacitor might need replacement by a professional. 

Inspect for Ice Build-Up 

If your AC has ice on the evaporator coils, it won’t function properly: 

  • Inspect the Coils: Check if there’s ice buildup on the evaporator coils. This could indicate low refrigerant levels or airflow issues. Turn off the AC and let the ice thaw completely before restarting it. 

Professional AC Repair Near You 

If these troubleshooting steps don’t resolve the issue, it’s time to call in the professionals. Our expert technicians in Sacramento, Roseville, Folsom, Rancho Cordova, Elk Grove, Davis, Rocklin, and surrounding areas are ready to diagnose and fix your AC problems swiftly and effectively. 

Contact Us Today! 

Don’t let a malfunctioning AC ruin your comfort. Contact Always Affordable HVAC and Plumbing now at (916) 970-0027 for reliable AC repair near you. Our team is dedicated to restoring your home’s comfort quickly. Let’s get your AC running smoothly again! 


How to troubleshoot an AC without turning it on? 

If your AC isn’t turning on, start by ensuring the thermostat is set to “cool” and the temperature is below the current room temperature. Check the circuit breaker to make sure it hasn’t tripped and inspect the air filter for any blockages that could restrict airflow. Additionally, ensure the outdoor unit is free of debris and the condensate drain line isn’t clogged. If these steps don’t solve the issue, professional AC repair may be needed. 

What would cause an AC unit to not turn on? 

Several issues could prevent an AC unit from turning on. Common causes include a tripped circuit breaker, a blown fuse, a faulty thermostat, or a clogged air filter. Additionally, problems like a damaged capacitor or a malfunctioning compressor can also be the culprits. It’s important to address these issues promptly to avoid further damage to your system. 

Why won’t my air conditioner start up? 

An air conditioner might fail to start due to reasons like a dead thermostat battery, electrical issues, or mechanical problems within the unit. Check if the thermostat is functioning correctly and set properly. If the circuit breaker is not tripped and the unit still doesn’t start, it could be an indication of a more serious issue, such as a failed compressor or motor. 

How do I reset my air conditioner? 

Resetting your air conditioner typically involves turning off the thermostat and switching off the power at the circuit breaker. Wait for about 5 minutes before turning the breaker back on. Then, set the thermostat to the desired temperature and turn it back on. This process can help reset any minor issues within the system. 

What is the first thing to check when the AC goes out? 

The first thing to check when your AC stops working is the thermostat settings. Ensure it is set to “cool” and set below the room’s current temperature. If the thermostat is fine, check the circuit breaker to see if it has tripped. Inspect the air filter as well to make sure it’s not clogged, which can impede airflow and cause the system to shut down. 

Why is my thermostat on but AC not running? 

If your thermostat is on but the AC isn’t running, it might be due to a tripped circuit breaker, a clogged air filter, or issues with the condensate drain line. Another possibility is that the thermostat itself is malfunctioning or needs new batteries. Additionally, there could be a problem with the AC unit’s internal components, such as the capacitor or the compressor.