The whir of your air conditioner (AC) is a familiar summer soundtrack. It's the comforting hum of cool air production that keeps us comfortable through scorching days. But what happens when the sound changes?
When a new rattle or screech pierces the usual hum, it can be easy to dismiss it as background noise. However, there's a reason your AC makes noise—it's a way for it to communicate its health. Below, we discuss common strange noises an AC makes and what those sounds might mean.
6 Sounds from Your Air Conditioner You Shouldn’t Ignore
You should always pay attention to the sounds your air conditioning system makes. These sounds can indicate potential problems that, if left unaddressed, could lead to:
- decreased efficiency,
- increased energy bills, or
- even a complete system breakdown.
Some particularly concerning sounds to be aware of include the following:
- Buzzing. A persistent buzzing sound (like that of a bee or another insect) from your outdoor unit can signify various issues, including a blockage, issues with the fan blades, or a frozen line.
- Squealing or whistling. High-pitched squealing noises often point to worn or malfunctioning fan bearings, a loose belt (in older models), a loose seal, or internal pressure buildup.
- Rattling: Rattling sounds can indicate loose parts within the unit, debris caught in the fan, or a failing electrical contractor. Left unattended, these issues can cause further internal damage and reduce cooling effectiveness.
- Banging. Loud or heavy banging noises are a cause for immediate concern and could signify a severely misaligned fan or an issue with the compressor. You should turn off the AC and contact an HVAC professional to prevent further damage.
- Gurgling. A bubbling or gurgling sound can signal that you have a refrigerant leak, which is a serious risk to your health. Refrigerant can cause nausea, vomiting, and respiratory concerns. You should contact an HVAC repair service as soon as possible if you suspect such a leak.
- Water running. If your AC is making noises that sound like water is running or dripping, your AC’s drain line may be damaged. The drain line takes water from the AC to the outside of your home; if left unchecked, your AC unit can suffer severe damage.
What to Do If You Hear These Noises
As we mentioned, if your AC is making strange noises, contacting a qualified HVAC technician is in your best interest. In addition to the sounds listed above, any new or unusual noises emanating from your AC warrant attention. A qualified HVAC technician can diagnose the cause of the problem and recommend the appropriate course of action. Early intervention can save you money on repairs and ensure your AC continues to operate efficiently for years to come.
AC Making Noise? Contact Us to Schedule a Service!
The HVAC technicians at Donmar Heating, Cooling & Plumbing are known for doing “exceptional” work and making a “real impression” on our customers—just look at our reviews. If you need AC repair or maintenance service, you can trust our team with the job.
Contact us online or at (703) 457-8676.