When your air conditioning unit suddenly stops working, it can be a frustrating experience, especially during the hot summer months when comfort is essential. Before picking up the phone to call a professional, there are a few basic troubleshooting steps you can take on your own to determine if the issue can be fixed without needing a service call. At D-N-D Services, we’ve been helping homeowners and businesses in Rockwall and surrounding areas since 1997, and we understand the importance of addressing HVAC issues quickly and efficiently. Here’s a guide on how to troubleshoot a malfunctioning AC unit before calling a pro.
Check the Thermostat Settings
Sometimes, the problem may not be with the air conditioner itself, but rather with the thermostat settings. Before assuming there’s a mechanical issue, make sure the thermostat is set to “cool” and the temperature is set lower than the current room temperature. If the thermostat has a battery, check whether the battery needs replacing. Inaccurate or dead batteries can prevent the thermostat from sending the correct signals to the air conditioner.
Tip: If you have a programmable thermostat, ensure the schedule is set correctly. Sometimes the settings may have been accidentally altered.
Inspect the Air Filter
A clogged or dirty air filter is one of the most common reasons an AC unit might malfunction. When the air filter is clogged, it restricts airflow, causing the system to overheat and freeze up, or it may simply fail to cool your home properly. Inspect the air filter to see if it’s clogged with dust, dirt, or debris. If it’s dirty, replace it with a clean one.
Tip: Regularly changing the air filter is essential to maintain optimal performance. Filters should be replaced every 1-3 months, depending on usage and the environment.
Check the Circuit Breaker
Your air conditioning system relies on electricity to function, and if the circuit breaker is tripped, the system will not operate. If your AC unit isn’t turning on at all, check the electrical panel to see if the breaker connected to the AC has been tripped. If it has, simply flip the breaker back to the “on” position and see if the unit powers up.
Tip: If the breaker keeps tripping, this may indicate a more serious electrical problem, such as a short circuit, and it’s best to contact a professional HVAC technician to investigate further.
Ensure the Outdoor Unit is Clear
The outdoor unit of your air conditioning system (also known as the condenser) plays a crucial role in releasing heat from inside your home. If the outdoor unit is blocked by debris, such as leaves, branches, or dirt, it can cause the system to overheat or stop functioning properly. Walk around the outdoor unit to ensure it’s clear of obstructions and that there is ample space for airflow.
Tip: While you’re at it, check the condenser coils for dirt buildup. If they appear clogged, you can gently clean them with a brush or a hose (ensure the unit is powered off first). However, avoid using high-pressure water as it can damage the unit.
Examine the Condensate Drain
The condensate drain allows excess moisture to escape from the air conditioner. If the drain is clogged, water can back up into the unit, causing it to malfunction or even stop working entirely. If your AC has a visible drain line, check for any signs of water backup. You can attempt to clear the clog by gently flushing the drain with a wet/dry vacuum or a plumber’s snake.
Tip: Regularly clean the condensate drain to prevent clogs. If you notice that your system frequently gets clogged, it may be a sign that the drain line is improperly sized or there’s an issue with the installation.
Inspect the Coils
Both the evaporator and condenser coils in your air conditioning system play a vital role in heat transfer. If either coil is dirty, it can cause the system to freeze up or overheat. Check the evaporator coils (located inside the air handler) for dust and debris buildup. You can clean the evaporator coils with a coil cleaner, but if you’re unsure of how to do this, it’s best to call in a professional to avoid damaging the unit.
Tip: If the condenser coils outside are covered in dirt, this can also cause the system to overheat. Use a soft brush or a garden hose to clean the coils gently, being careful not to damage any components.
Check for Refrigerant Leaks
Refrigerant is the substance that cools the air in your AC unit. If the refrigerant level is low, your system will not cool effectively and may eventually stop cooling altogether. While you can’t easily check the refrigerant level on your own without the proper tools, you can look for signs of a refrigerant leak. These signs include ice buildup around the refrigerant line or a hissing sound near the AC unit.
Tip: Low refrigerant levels often indicate a leak in the system. This is a job for a licensed HVAC technician, as recharging the refrigerant or fixing the leak requires specialized tools and expertise.
Listen for Unusual Noises
Pay attention to any unusual sounds your air conditioner is making. For instance, if you hear a grinding, rattling, or squealing sound, it could indicate an issue with the motor, fan, or other moving parts. Sometimes, these noises can be caused by a loose component that needs tightening or lubrication.
Tip: If you hear a loud banging or grinding sound, immediately turn off the AC and contact a professional HVAC technician. Continuing to run the system while it makes unusual noises can cause further damage.
Check the Vents and Ductwork
Blocked or closed vents can restrict airflow, reducing the efficiency of your air conditioner. Make sure that all vents in your home are open and unblocked by furniture or other obstructions. Also, check for any visible signs of damage to the ductwork that may be causing air leakage.
Tip: If you notice significant air leakage around the duct joints or if there is a noticeable drop in airflow, you may need to have your ducts professionally cleaned or sealed.
When to Call a Professional
If you’ve gone through these troubleshooting steps and your air conditioning unit is still malfunctioning, it may be time to call in a professional. Certain issues, such as refrigerant leaks, electrical problems, and compressor issues, require the expertise of a licensed HVAC technician. At D-N-D Services, our NATE-certified technicians can quickly diagnose and repair your air conditioning system, ensuring that your home stays cool and comfortable.
Conclusion
Troubleshooting a malfunctioning AC unit can often be a simple process with just a few basic steps. By checking the thermostat, cleaning filters, inspecting the outdoor unit, and ensuring proper airflow, you can resolve many common issues without needing a service call. However, if the problem persists or if you suspect a more complex issue, don’t hesitate to contact a trusted HVAC professional. At D-N-D Services, we’ve been providing reliable HVAC services in Rockwall and surrounding areas for over 25 years, and we’re always here to help keep your home or business cool and comfortable.
D-N-D Services Heating & Air Conditioning is the premier choice for HVAC services in Rockwall. With a team of highly trained and certified technicians, we have the expertise to handle all of your heating, ventilation, and air conditioning needs. Our commitment to customer satisfaction is unmatched, and we always go above and beyond to ensure that your experience with us is positive. We use only the highest quality parts and equipment to ensure that your HVAC system is running at peak performance. Plus, we offer competitive pricing and flexible scheduling to fit your needs. Choose D-N-D Services Heating & Air Conditioning for all of your HVAC needs in Rockwall.
