There’s nothing worse than realizing your AC stopped working right when the desert heat hits. In Palm Desert, CA, where summer temperatures regularly soar past 100 degrees, a broken air conditioner isn’t just uncomfortable—it can be dangerous. At PRO-formance Heating & Air, we understand how critical it is to restore your cooling system quickly. That’s why we created this guide to help you figure out why your AC stopped working, what you can do about it, and when to call in the experts.

Thermostat Problems Could Be Why Your AC Stopped Working

Start with your thermostat. This small device controls your entire cooling system, and if it’s not working right, your AC may have stopped working. Whether the settings changed, the batteries died, or the thermostat stopped communicating with your AC, these issues can disrupt performance.

Check these things first:

• Is the thermostat set to “cool”?

• Is the temperature lower than the room’s current temperature?

• Do the batteries need replacing?

• Does the screen show any errors?

If everything checks out and the AC still isn’t working, it’s time to keep troubleshooting.

A Tripped Breaker Might Explain Why the AC Stopped Working

If your AC stopped working, an electrical issue might be to blame. Air conditioners use a lot of power, and if a circuit overloads, your system will shut down to prevent damage.

Here’s how to check:

1. Go to your home’s electrical panel.

2. Look for any tripped breakers.

3. Flip the affected breaker off, then back on.

If the breaker trips again, stop and call a professional. Repeated tripping usually signals a deeper electrical problem, such as a short or failing component.

Dirty Filters Can Cause Your AC to Stop Working

One of the simplest and most common reasons your AC stopped working is a dirty air filter. When airflow becomes restricted, your system can freeze up or overheat, forcing it to shut down. The EPA recommends changing air filters every 60 to 90 days (or more often in dusty areas like Palm Desert) to maintain healthy indoor air quality and keep your system running smoothly.

Here’s what to do:

• Turn off the unit.

• Find the air filter and remove it.

• Replace it with a clean one.

• Wait a few hours before turning the system back on.

Even if this doesn’t fix the issue right away, clean filters will help your system run more efficiently and last longer.

Refrigerant Leaks Often Lead to an AC That Stopped Working

If your AC blows warm air or doesn’t cool properly, a refrigerant problem could be the reason your AC stopped working. Your system needs the right refrigerant level to function. A leak can lower that level and reduce the AC’s ability to cool your home.

Watch for these signs:

• Hissing or bubbling sounds near the AC

• Ice buildup on the refrigerant lines

• Higher energy bills

• AC runs constantly but never cools

Only licensed HVAC pros can handle refrigerant issues. PRO-formance Heating & Air will inspect your system, find the leak, and recharge your refrigerant properly.

Your Outdoor Unit Could Be Why the AC Stopped Working

The outdoor condenser unit plays a vital role in the cooling process. If it’s clogged with dirt or debris—or if the components inside fail—your AC may have stopped working.

Try this quick fix:

• Turn off power to the unit.

• Clear away any visible debris.

• Use a garden hose to rinse off the coils gently.

If the fan won’t spin or you hear strange sounds, don’t try to repair it yourself. Call a professional to avoid causing more damage.

Frozen Coils Can Shut Down Your AC System

Although it sounds odd, frozen evaporator coils often cause systems to shut down. When airflow becomes restricted—usually because of dirty filters, blocked vents, or low refrigerant—ice forms on the coils and stops the cooling cycle.

If your AC stopped working, check for these signs:

• Ice on the indoor unit or refrigerant lines

• Reduced or no airflow

• System running but not cooling

Turn off the AC and let the ice melt. Then, clean or replace your filter and make sure vents stay open and unblocked. If it freezes again, a technician needs to inspect it.

When to Call PRO-formance Heating & Air for Help

You can fix some AC problems on your own, but not all. If your AC stopped working and basic troubleshooting doesn’t help, call PRO-formance Heating & Air in Palm Desert.

Reach out if:

• The unit won’t turn on

• You hear buzzing or grinding noises

• Ice or water appears near the system

• The thermostat stops responding

• The system turns on and off frequently (short cycling)

Our experienced technicians will inspect your system, diagnose the issue, and get your AC running again—fast and professionally.

Keep Your AC Running with Preventative Maintenance

The best way to avoid waking up to find your AC stopped working is with regular maintenance. Routine checkups keep your system running smoothly and prevent small issues from turning into major repairs.

Our maintenance service includes:

• Coil cleaning

• Refrigerant checks

• Airflow testing

• Electrical inspection

• Filter replacement

In a hot, dry climate like Palm Desert, it’s especially important to keep your system in peak condition.

Don’t Sweat It—We’ll Fix It Fast

If your AC stopped working, don’t wait for the heat to get worse. Whether it’s a thermostat problem, a tripped breaker, or something more serious, PRO-formance Heating & Air has the expertise to fix it. We’re local, responsive, and ready to restore your comfort.

Contact us today to schedule service and stay cool all year long.