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What Should I Do If My AC Stops Working Completely?

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DIY Tricks Before You Call a HVAC Company

When your air conditioner won’t turn on at all or stops working, don’t panic. There are a few DIY things you can check yourself before calling for service.

Here’s what to do:

Check Your Thermostat First

Make sure your thermostat is set to “cool” mode and the temperature is set lower than the current room temperature. Replace batteries if it’s battery-powered, and make sure the display is working. Sometimes the simplest solution is the right one.

Look At Your Circuit Breakers

AC systems have two breakers, one for the indoor unit and one for the outdoor unit. Check your electrical panel to see if either breaker has tripped. If a breaker has tripped, you can try resetting it once, but if it trips again immediately, don’t keep resetting it—that indicates an electrical problem that needs professional repair.

Make Sure The Outdoor Disconnect Is On

The outdoor AC unit has a disconnect box near it that lets you shut off power for service. Make sure this disconnect switch hasn’t been accidentally turned off or pulled out. This happens more often than you’d think, especially after lawn service or other outdoor work.

Check For Visible Problems Outside

Take a look at your outdoor unit. Is the fan spinning? Do you hear the compressor running (a humming or buzzing sound)? Is there ice on the refrigerant lines? These observations help technicians diagnose problems faster when they arrive.

Don’t Wait Too Long To Call

If simple checks don’t solve the problem, call for professional service rather than letting your home get unbearably hot. The longer you wait, the more uncomfortable you’ll be, and some problems can actually get worse if the system keeps trying to run while something is wrong.

Give Dawson’s Electric & Air a call at 919-887-8284 for fast help from Raleigh to Fuquay Varina in Wake County or contact us online with any questions!

Travis Dawson

Travis Dawson

Travis Dawson is the founder and president of Dawson's Electric & Air, serving homeowners throughout the Triangle area of North Carolina. With more than 30 years of experience in electrical, HVAC, construction, and home renovation, he has built a reputation for quality workmanship, practical expertise, and honest advice. Before founding Dawson's Electric & Air in 2005, Travis worked as an electrician and industrial maintenance technician after earning an Associate Degree in Industrial Technology and obtaining his North Carolina Electrical Contractor License. Throughout his career, he has worked alongside every major trade, built custom homes, completed major renovations, and helped thousands of homeowners solve electrical and HVAC challenges. As a licensed electrical contractor, licensed general contractor, and business owner, Travis is passionate about educating homeowners on electrical safety, HVAC systems, and home improvement. He regularly shares expert insights and serves as a trusted resource for homeowners, journalists, and media outlets.