Hearing strange noises when your air conditioner is working? There's likely something wrong with your unit. If you don’t fix it, it could lead to significant—and expensive—issues down the road. We're going to help you figure out what’s happening with your air conditioner and what you can do to change it.
8 Common Air Conditioning Noises
- Gurgling - Gurgling usually indicates a complication with your refrigerant line. If you can't pinpoint where the noise is coming from, that's alright. A professional can help find out where this noise is occurring. You can read more information on our gurgling noises guide.
- Crackling - Crackling could come from debris in the unit or aging ductwork. Debris in the outdoor unit will generate a noise outside your house. Old ductwork can create noise inside your house. Browse our crackling noise guide for more information.
- Hissing - Hissing can be created by a faulty refrigerant line, an internal valve leak or the compressor. Peruse our hissing noise guide for more on that.
- Buzzing - Buzzing is probably an electrical issue. Read our buzzing noise guide for further information.
- Clicking - Clicking can mean you have a loose part or that the fan is misaligned. You can check out more information in our clicking noise guide.
- Pulsating - Pulsating can be caused by a loose part. Check out our pulsating noise guide for more information.
- Loud Noise - A clear noise from your outside unit can indicate an issue with your compressor, damper, fan or air handler. Check out our loud noise guide for more information.
- Humming - Humming can begin with fan motor issues or a broken relay switch. Head to our humming noise guide for more information.
You can find further information about common air conditioning troubles on energy.gov
Should I keep operating my AC when it’s making a noise?
There are limited cases where you can continue to run your AC, but you do so at your own risk. It's almost impossible to answer this question without examining your system.
Most of the time, we recommend turning the unit off and calling a professional.
When should I do something about the noise?
We recommend calling a professional as soon as you recognize there's a problem with your air conditioner. While AC repairs can be stressful and an unexpected expense, it's best to get problems corrected right away. Contacting a professional could help reduce future expenses and keep your system running longer.
Not sure if your air conditioner is making any of these noises? Please fill out the form below for a free, in-home consultation.