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Serving the Greater Los Angeles Area


Serving the Greater Los Angeles Area


JMS Air Conditioning and Heating Blog

5 Sounds Your AC Isn’t Supposed to Make

Your air conditioner is one of the most expensive systems in your home. You want it to work great without experiencing any problems, but the reality is you will have issues from time to time. The good news is, AC problems usually have clear signs, like unusual sounds, that indicate when something is wrong.

If you pay attention to the sounds that your air conditioner makes, you can easily stay ahead of problems and prevent them from getting worse or causing a breakdown. If you hear something unusual and you need AC repair in Los Angeles, our team is the one to call. We’re experts at all things air conditioning and would love to help your family. You can keep reading to learn more about the sounds that can mean trouble for your air conditioner. 


All the different components in your AC system have to work together smoothly to provide cool air for your home. A lack of lubrication or a part coming loose can lead to grinding sounds that are very ominous. It may sound like metal on metal, and probably because it is.

The good news is, if you catch a grinding sound early, you can prevent it from damaging the components in question. If you hear grinding from your air conditioner, turn the system off immediately and call our team. We can make repairs to get your AC in good working order again.

Rattling or Knocking

Usually, if you hear something inside your AC rattle or knock, it means that a component is loose and moving around. A rattling sound may indicate that a smaller part is loose and knocking around inside the unit somewhere. A knocking sound can mean that a door or something larger came loose and is banging against another service inside of the AC. Either of these sounds is a problem that you want to get addressed sooner rather than later. 


This is one of those sounds that is perfectly acceptable to hear sometimes, but not always. When your air conditioner is on and actively cooling your home, you may hear a very gentle humming sound as the compressor does its magic.

But if the humming sound persists after your air conditioner is off, or the humming sound becomes too loud, that’s a sign of compressor problems. Humming should fade into the background as white noise and nothing more. 

If nothing is noticeably wrong, you may be tempted to ignore this sound and hope for the best. However, it is always better to be safe rather than sorry when it comes to your air conditioner. The worst-case scenario is that our team comes out and confirms that everything is in fact OK.

Ignoring the sound could result in a complete compressor breakdown, which can cost thousands of dollars to replace. Not to mention the inconvenience of potentially going without your AC for a few days during the heat of summer.

JMS Air Conditioning and Heating has your back. Call us today to schedule an appointment for AC repair in Glendale, CA!

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