In some cases, keeping up with regular maintenance like cleaning the unit and changing dirty air filters can fix problems associated with humming noises. Other causes, like faulty fan motors, loose and worn components and electrical issues warrant professional diagnosis and repair.
How do I stop my air conditioner from humming?
Your AC Unit is Frozen
When the air conditioner is running for long periods of time, it can freeze up, which will cause a loud buzzing sound. If this happens, turn off the unit to let it thaw. After a few hours of it being off, it should be running again without issue when you switch it back on.
Why is my AC humming so loud?
Your air conditioning unit’s compressor works to pressurize and cool the refrigerant. A buzzing sound may indicate that the compressor is not working properly, or that there’s an electrical problem.
