Hearing odd noises when your air conditioner is on? There's a strong probability there’s something wrong with your unit. If you don’t fix it, it could lead to extensive—and expensive—troubles eventually. We're going to help you understand what’s happening with your air conditioner and what you can do to correct it.
8 Common Air Conditioning Noises
- Gurgling - Gurgling normally indicates an issue with your refrigerant line. If you can't determine where the noise is emanating from, that's alright. An expert can help determine where this noise is occurring. You can read 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 create a noise outside your house. Mature ductwork can produce noise inside your house. Read our crackling noise guide for more information.
- Hissing - Hissing can be caused by a leaky refrigerant line, an internal valve leak or the compressor. Check out our hissing noise guide for more information.
- Buzzing - Buzzing is probably an electrical issue. Read our buzzing noise guide for further information.
- Clicking - Clicking can indicate 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. Go through our pulsating noise guide for more information.
- Loud Noise - A noticeable noise from your outside unit can indicate an issue with your compressor, damper, fan or air handler. Look at our loud noise guide for supplementary information.
- Humming - Humming can begin with fan motor issues or a damaged relay switch. Check out our humming noise guide for more information.
You can find additional information about prevalent air conditioning issues on energy.gov
Should I keep running 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 shutting down 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 a problem with your air conditioner. While AC repairs can be stressful and an unexpected spend, it's best to get problems taken care of right away. Getting a professional could help minimize 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.