Hearing strange noises when your air conditioner is running? There's a strong probability there’s something wrong with your unit. If you don’t pay attention to it, it could lead to major—and expensive—problems eventually. We're going to help you figure out what’s going on with your air conditioner and what you can do to change it.
8 Common Air Conditioning Noises
- Gurgling - Gurgling generally indicates a complication with your refrigerant line. If you can't pinpoint where the noise is originating from, that's alright. An expert can help verify where this noise is occurring. You can learn more information on our gurgling noises guide.
- Crackling - Crackling could be due to debris in the unit or aging ductwork. Debris in the outdoor unit will generate a noise outside your house. Mature ductwork can cause noise inside your house. Check out our crackling noise guide for more information.
- Hissing - Hissing can come from a leaky refrigerant line, an internal valve leak or the compressor. Check out our hissing noise guide for more on that.
- Buzzing - Buzzing is probably an electrical issue. Check out our buzzing noise guide for more information.
- Clicking - Clicking can mean you have a loose part or that the fan is misaligned. You can see more information in our clicking noise guide.
- Pulsating - Pulsating can be due to a loose part. Take a look at our pulsating noise guide for more information.
- Loud Noise - A loud noise from your external unit can signal an issue with your compressor, damper, fan or air handler. Read our loud noise guide for supplementary information.
- Humming - Humming can be related to fan motor issues or a busted relay switch. Head to our humming noise guide for more information.
You can find additional information about frequent air conditioning troubles on energy.gov
Should I keep running my air conditioner 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 inspecting your system.
In most cases, 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 think there's an issue with your unit. While AC repairs can be stressful and an unexpected expense, it's smart to get problems fixed right away. Getting a professional could help lower 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.