Why Your AC Is Making Noise Even After It’s Off

AC systems make a lot of noise when they’re operating. These noises can give you clues about how well it’s running, if it needs repairs, and if your HVAC is in good shape for the season. Many HVACs even make noise when they’re off between cooling cycles. Sometimes, these noises are normal—other times, they might mean it’s time to schedule an appointment with Herrmann Services. Learn more about what it might mean if your AC is making noise when off. 

Is it Normal for Your AC to Make Noise After Shutting Off?

Yes! ACs make noise almost all the time, and it doesn’t necessarily mean something is wrong. Try to identify what type of noise it is (and how frequently you hear it). 

When Sounds Are Harmless—And When They’re Not

As a general rule of thumb, quiet noises are harmless, especially if they fade away soon after the unit powers down. Most of these smaller noises are the system slowing to a halt and settling. Louder noises are typically a bigger problem, as they may indicate loose, heavy parts.  Continuous sounds can also indicate a problem. 

What to Do When AC is Making Noise Even After It’s Off

If your air conditioner is making a noise you’ve never heard before — or you think it may be malfunctioning — it’s always best to have a professional take a look. While some sounds may be harmless, others could be signs of bigger issues that shouldn’t be ignored.

Instead of trying to troubleshoot it on your own, our licensed HVAC technicians can diagnose the problem and get your system back to running smoothly.

When It’s Time to Call a Professional

For an unfamiliar noise, it’s best to call a professional HVAC technician to inspect the AC system and make repairs. For example, if your air conditioner is buzzing when off or making loud noises, that indicates serious problems that need specialty parts and careful handling. 

Prevent Noisy AC Problems With Regular Maintenance

For peace of mind year-round, our Family Maintenance Plans make it easy to keep your heating and cooling system in top condition. With regular checkups, priority scheduling, and exclusive member benefits, you’ll have confidence knowing your home comfort is always protected.

Hearing Strange A/C Noises? Let Herrmann Services Help

If your AC is making a new noise, Herrmann Services is here to help. Contact us today to tell us what types of noises you’re hearing, or get to the bottom of it with a convenient service appointment.

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