Since you rely on your air conditioning unit to shield you from the hot summer heat, it can be quite concerning when you hear unfamiliar or loud noises from your AC. Noise isn’t necessarily uncommon in an AC system when it’s first turned on or when the thermostat is adjusted. Too much noise, however, could signal that you’ve got a problem with your unit or it might be nearing the end of its lifespan. Ignoring the noises could allow problems to worsen or even lead to a breakdown requiring an AC repair down the line.
Minor issues quickly become major ones. Whether you need a simple air conditioning tune-up or it’s time to replace the unit, addressing the issue as soon as possible is essential. Keep reading to learn more about the reasons your AC might be making strange noises and how you can resolve them.
1. Frozen AC Unit
If you hear a loud buzzing noise emanating from your AC unit, it is likely frozen. Airflow obstructions prevent the AC coils from adequately cooling, which can lead to a frozen unit. Like a clogged air filter, blocked vent returns and registers impede adequate airflow to and from the system. As a result, your system works harder than necessary without a way of releasing the conditioned air. Once your unit is frozen, the compressor is unable to get sufficient air to cool itself and may make a lot of buzzing noises. Sometimes, these noises can be very loud and impossible to ignore. If you are experiencing such a noise, the best thing you can do is try to thaw the unit first. To do this, turn the unit off for some time and give it a rest. You should turn it on to the lowest setting and listen for the noise. If the problem still exists, you should talk to your local HVAC professional.
2. Loose AC Parts
Is your AC making rattling or buzzing noises? Loose parts could be to blame. When your system operates, it vibrates. This can loosen parts, which may move and make noise. Over time, this can affect the efficiency of your AC unit or cause it to shut down completely. In some cases, those loose parts could cause a fire. If you’ve got rattling or buzzing coming from your AC, you’ll need professional help. The AC unit will need to be opened and examined for loose screws or other parts. A technician will determine the best way to proceed and repair your AC unit.
3. Condenser Fan Motor Issue
The condenser fan circulates air from the outside unit to ensure your system is running optimally. Sometimes, the condenser fan may make some buzzing noise that could signal a problem. That might happen when the inside blower works as it should, but the fan is not rotating. Turn off your unit and check if any debris inside the fan or missing parts are restricting it from working. However, ensure you call a professional to fix the issue to prevent a recurring problem.
4. Electrical Issues
Loose wires, failing circuit boards, and similar issues can cause buzzing or humming noises. Electrical issues such as these make your AC unit not just less efficient but also less safe. You should not try to DIY electrical repairs on your AC unit. If you suspect that your AC has an electrical issue, call for professional help right away.
5. The Refrigerant Is Leaking
Refrigerant is the chemical responsible for cooling the air inside your home. If it’s leaking, your AC might make a humming sound. A leak will interfere with the AC unit’s ability to cool the air and may cause the entire system to fail. If you’ve noticed water pooling around the unit, bubbles in the evaporator coils, frequently frozen evaporator coils, or longer-than-usual cooling cycles along with the humming noise, you may have a refrigerant leak.
Call the Professionals
Abnormal noises from your AC unit are often a sign that your system is not working as efficiently as it should be and might even pose a risk to your home. If you notice any of these noises, your AC might be at risk. A professional HVAC contractor can help.
You can rely on Bone Heating & Cooling to service and repair your HVAC system. We offer exceptional repair and maintenance services throughout Festus and the surrounding areas and work with many makes and models of AC. We can also address other common HVAC system issues to keep you cool and comfortable throughout the summer. Call us at Bone Heating & Cooling today for HVAC services.
