Hearing odd noises when your air conditioner is running? There's a strong probability there’s something wrong with your AC. If you ignore it, it could lead to extensive—and expensive—issues eventually. We're going to help you figure out what’s going on with your air conditioner and what you can do to fix it.
8 Common Air Conditioning Noises
- Gurgling - Gurgling generally indicates an issue with your refrigerant line. If you can't determine where the noise is emanating from, that's alright. A professional 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. Old ductwork can produce noise inside your house. Check out our crackling noise guide for more information.
- Hissing - Hissing can come from a damanged refrigerant line, an internal valve leak or the compressor. Check out our hissing noise guide for more on that.
- Buzzing - Buzzing is no doubt an electrical issue. Check out our buzzing noise guide for additional information.
- Clicking - Clicking can hint you have a loose part or that the fan is misaligned. You can find more information in our clicking noise guide.
- Pulsating - Pulsating can be caused by a loose part. Take a look at our pulsating noise guide for more information.
- Loud Noise - A loud noise from your external unit can mean an issue with your compressor, damper, fan or air handler. Look at our loud noise guide for more 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 issues on energy.gov
Should I keep operating my air conditioner when it’s making a noise?
There are some cases where you can continue to run your AC, but you do so at your own risk. It's hard 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 suspect there's a problem with your unit. While AC repairs can be stressful and an unexpected cost, it's best to get problems corrected 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.