There’s nothing worse than coming home on a hot day, only to realize that your air conditioner has stopped working. Before panicking or calling a professional, there are a few troubleshooting steps you can take to potentially fix the issue yourself. With this in mind, we at Absolute P&M Services would like to share what to do when your AC suddenly stops working.

What is the First Thing to Check when the AC Stops Working?

1) Check the Thermostat. One of the most common reasons an AC stops working is a thermostat issue. Ensure that your thermostat is set to “cool” and that the temperature is lower than the current room temperature. If your thermostat runs on batteries, replace them and check for any display malfunctions.
2) Inspect the Power Supply. If your AC is not turning on at all, check your power sources. Look at your home’s circuit breaker to see if the breaker for the AC has tripped. If it has, reset it and see if the AC starts working again. Also, verify that the unit’s power switch is in the “on” position.
3) Examine the Air Filter. A clogged or dirty air filter can cause your AC to shut down or operate inefficiently. If your filter is covered in dust and debris, replace it with a clean one. This can often resolve airflow issues and prevent the system from overheating.
4) Check the Outdoor Unit. Your AC’s outdoor unit (condenser) plays a crucial role in cooling your home. If it’s covered in dirt, leaves, or other debris, it may struggle to function properly. Clear away any obstructions and make sure the unit has proper airflow. Also, check if the condenser’s fan is spinning; if not, it may indicate a motor or capacitor issue.
5) Look for Refrigerant Leaks. Low refrigerant levels can prevent your AC from cooling properly. Signs of a refrigerant leak include ice forming on the coils, hissing noises, or a sudden drop in cooling performance. If you suspect a leak, contact a professional technician for repair.
6) Inspect the Drain Line. Air conditioners produce condensation, which is drained away through a drain line. If this line becomes clogged, the unit may shut down to prevent water damage. Check for any visible clogs and clear them using a wet/dry vacuum if necessary.
7) Give It Time to Cool Down. Sometimes, an AC system can overheat due to extended use, especially in extremely hot weather. If your unit has shut down, turn it off for about 30 minutes to an hour before trying to restart it. This can help reset internal safety features.
8) Call a Professional AC Contractor. If you’ve gone through these steps and your AC still isn’t working, it’s time to call an HVAC professional. A trained technician can diagnose and repair issues such as electrical failures, compressor problems, or refrigerant leaks that require expert attention.

Central Air Conditioning Maintenance, Repairs, Replacement & More in Santa Fe, Tomball, Sugar Land, Galveston, Austin & Greater Houston, Texas

By following these troubleshooting steps, you may be able to restore your AC’s functionality quickly. Regular maintenance, such as changing air filters and cleaning the outdoor unit, can also help prevent unexpected breakdowns in the future. Call Absolute P&M Services when you are in need of professional AC services.