If your home’s air conditioner starts to make a strange noise, turn off the unit right away and call Service 1st Pros. We will come out and inspect the unit to find out why it is being noisy. We will give you a detailed estimate to repair the problem and then do just that when you say it’s okay. Here are some strange noises air conditioning units can make and their causes.
Banging/Thumping
The air conditioner’s compressor can start to bang or thump if the internal mechanisms are loose. As they move around inside the compressor, they may also make a rattling noise. We can replace the compressor to prevent this noise from continuing every time the AC runs.
Screeching/Squealing
Screeching or squealing can happen if the fan motor inside the HVAC unit is experiencing problems. This fan helps to keep the refrigerant cold so the air flowing inside your home is nice and cool. You also have a fan motor inside your home and it, too, can screech or squeal if it is malfunctioning.
Humming/Whirring
If your air conditioner is humming, the contactor relay switch is defective and needs to be replaced. This switch receives the signal from the thermostat that the air is too hot in the home and fires up the condenser unit in the outside unit of your air conditioning system.
Buzzing/Whirring
If the whirring noise coming from the air conditioner is more like a buzz than a hum, the fan blades could be loose. This is dangerous because the blades can break free and damage the air conditioning system. Other loose components inside the unit can also buzz or whir.
Rattling/Clicking
Debris inside the air conditioner unit, such as leaves, can make a rattling or clicking sound when the AC is running. If you hear the thermostat clicking constantly, it needs to be replaced. You should only hear one click from the thermostat when the AC turns on and then turns off.
Hissing/Suction
If the air conditioner hisses or makes a strange suction sound when it is running, you may have a hole in the ducting system. It may also make a hissing or suction sound if the air filter in the unit is the incorrect size. The expansion valve can also hiss if it is malfunctioning.
Finally, Service 1st Pros in Auburn, GA, advises that the AC may bubble if there is too much water in the system. This can be caused by a clogged line.