What to Do When Your AC Is Not Working
Air conditioning is an essential part of maintaining comfort, especially during the sweltering summer months. A functional air conditioner not only keeps your home cool but also improves air quality and regulates humidity. However, like all mechanical systems, air conditioners can experience malfunctions, leaving you wondering, “Why is my air conditioner not working?” The good news is that many problems that your AC may encounter can be resolved through simple troubleshooting steps before calling for professional help. This article will provide a clear, step-by-step guide to what to do when your AC is not working and when it’s time to call AC repair services.
1. Check the Power Source
Before jumping to conclusions, it’s crucial to start with the most basic checks, such as ensuring that your air conditioner is receiving power.
Confirm the AC is Properly Plugged In
As simple as it sounds, one of the most common reasons for an AC not working is that it’s either unplugged or has a loose connection. Ensure that your AC unit is securely plugged into an outlet. Sometimes, vibrations from the AC can loosen plugs over time, especially with window units. Double-check to see that all connections are tight.
Check the Circuit Breaker
Power surges or overloads can easily trip a breaker, cutting off power to your air conditioner. Head to your home’s electrical panel and look for the breaker assigned to your AC. If it’s in the “off” position or in the middle, it has likely tripped. To reset the breaker, flip it fully to the “off” position, then switch it back on. If the breaker trips again, there could be a larger electrical issue, and it’s best to contact an HVAC repair service to inspect the system.
Test the Thermostat
Your air conditioner relies on signals from the thermostat to maintain the desired temperature. Make sure your thermostat is set to the proper “cool” mode and adjust the “set” temperature to lower than the current room temperature. If you have a digital thermostat and the AC won’t turn on, the issue might be as simple as dead batteries. Replace the batteries and see if that resolves the problem.
2. Inspect the Air Filter
Your air conditioner’s air filter plays a crucial role in its performance by trapping dust, dirt, and other airborne particles, stopping them from entering the system.
Importance of Clean Air Filters
Dirty air filters can significantly reduce airflow, which forces the AC to work harder and may cause it to stop working altogether. If you’re noticing reduced airflow or warm air blowing, a clogged filter could be the culprit.
How to Check and Replace the Filter
Air filters are usually found behind the return air grille or inside the AC unit itself. To check the filter, remove it from its slot and hold it up to the light—if little to no light passes through, it’s time for a replacement. An average filter should be changed every 1-3 months, but this can differ due to factors such as furry pets in the household or if your home deals with a lot of dirt and dust. If your filter is washable, rinse it with water and let it dry before reinserting it.
3. Assess the Vents and Airflow
Reduced airflow can also be caused by blocked or closed vents.
Check for Blocked or Closed Vents
Walk around your home and inspect each vent. Ensure that no furniture, curtains, or other objects are obstructing the vents. All vents should be fully open to allow for proper airflow. Blocked vents can reduce the system’s efficiency, making it feel like your AC is not working properly.
Ensure Proper Airflow Throughout the House
Check each room in your home to see if cooling is consistent. If certain rooms feel significantly warmer, you may have a ductwork issue or need to adjust your home’s zoning system, if applicable. Ensuring balanced airflow is key to keeping your AC running smoothly.
4. Inspect the Outdoor Unit
The outdoor unit (condenser) deals with constant exposure to the elements, which means it can get clogged with debris or become damaged over time.
Clear Debris Around the Condenser
Leaves, dirt, grass, and other debris can accumulate around the condenser unit, restricting airflow. Carefully clear away any debris and ensure that there are at least two feet of clearance around the unit to allow for proper ventilation. Be cautious not to damage the condenser’s fins, which can easily bend and restrict airflow.
Check for Ice Buildup
If you notice ice on the outdoor unit or the refrigerant lines, this could indicate a more serious issue, such as low refrigerant or a clogged evaporator coil. In this case, turn off the unit and let it thaw for a few hours. Once the ice melts, you can restart the system to see if it resolves the issue. However, if ice buildup continues, contact an AC repair service, as this could indicate a refrigerant leak or airflow problem.
5. Look for Refrigerant Leaks
Refrigerant is vital for the cooling process, as it absorbs heat from inside your home and releases it outside.
Common Signs of Low Refrigerant
If your AC is blowing warm air, making a hissing noise, or you notice ice forming on the refrigerant lines, you may have a refrigerant leak. Low refrigerant can result in inefficient cooling and cause the system to break down completely over time if not dealt with.
Importance of Professional Repair
Refrigerant leaks should only be handled by a licensed HVAC contractor, as handling refrigerant improperly can be dangerous and illegal without the proper certifications. If you suspect that there is a refrigerant leak, call a professional immediately, as ongoing leaks can damage the system’s compressor.
6. Check for Any Strange Noises
Noticing unusual noises coming from your AC can indicate mechanical problems that need attention.
Common AC Noises and Their Causes
If you hear rattling, buzzing, or banging noises, these could indicate loose parts, a failing motor, or even debris caught in the system. Rattling may be caused by loose panels, while buzzing could be a sign of an electrical issue. Banging noises often point to a more serious problem, such as a broken component in the compressor.
Determine When to Call a Professional
While some noises, like loose panels, can be fixed with minor adjustments, others require the expertise of an AC repair service. If you’re unsure or the noise persists, it’s best to call a professional to avoid further damage.
7. When to Call a Professional HVAC Technician
While many AC issues can be fixed through simple troubleshooting, some problems require professional attention.
After Trying Basic Troubleshooting
If you’ve followed all the steps above and your AC still won’t turn on or isn’t cooling properly, it’s time to call an HVAC contractor for a thorough inspection. They can diagnose more complex issues that DIY troubleshooting won’t cover.
Complicated Issues That Require Professional Repair
Complications such as refrigerant leaks, compressor failure, and electrical malfunctions should be left to certified technicians. Attempting to fix these problems on your own can be dangerous and may void the warranty on your unit.
Regular Maintenance Plans
Many AC companies offer maintenance plans that include annual check-ups and cleanings. Regular maintenance is very effective at helping you avoid costly repairs and making sure that your system continues to run efficiently for years to come.
AC Malfunctioning? Contact Donovan & Jorgenson Heating and Cooling Today
If your AC is still not working after trying basic troubleshooting, it’s time to call in the professionals. At Donovan & Jorgenson Heating and Cooling, our NATE-certified technicians are eager to provide expert repairs and ensure your system is running efficiently. Regular maintenance is fundamental to avoiding future issues and keeping your home comfortable year-round. With over 35 years of trusted service in the Milwaukee area, including Mukwonago, New Berlin, and West Allis, WI, we’re proud to be employee-owned and are dedicated to delivering outstanding results every time. Contact us today for fast, reliable HVAC solutions you can count on!
