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July 12, 2022

Common AC Problems | Know the Signs

July 12, 2022

No one wants to deal with a comfort system that is showing signs of inefficiency or having recurring issues. If you have noticed that your AC is not performing as it should and blowing warm air, making new noises, doesn’t work at all, or has another issue, you don’t want you and your family to be without cool air for too long. You should know the signs that an issue may be looming and be aware of the most common AC problems many North Bay Area homeowners face. Let’s review.

What are the Most Common AC Problems?

You don’t need to be an air conditioner or HVAC expert to know when something is wrong with your cooling system. There are common AC problems you could face that are usually easy to identify on your own; however, the fix, may require calling in a North Bay Area cooling expert. Below we take a look at some of the most frequent issues we see.

  • AC Will Not Kick On: One of the most obvious issues you could have with your air conditioning is that it will not turn on at all. Maybe it kicked on when you initially started it and now will not come on, or if it wouldn’t start at all, either way, if it’s not working, there is a problem of some sort. The hindrance could be as simple as your thermostat not being set to a low enough temperature, needing new batteries, not being set to AC, or maybe needing to be replaced all together. If you can’t find an issue with your thermostat, contact a local AC repair professional to help you diagnose and resolve the problem.
  • New Noises: Your air conditioning should never be making noises that are louder than a hum. If you notice a hissing, clicking, thumping or rattling, screeching, or buzzing, that is not normal, and there is an issue. If your AC is making sounds, it is trying to tell you something, so don’t ignore it. The new noises could indicate that there is a refrigerant leak, blower or motor issue, the condenser fan motor has a problem, there are loose parts, there’s an electrical issue, or more.
  • Unpleasant Odors: Much like you should listen for signs of an issue with your AC, you should also keep your other senses alert. If you smell something burning when your AC is on, there could be an electrical issue, the air filters could be dirty and blocked, or there could be another issue. If you notice a musty smell, there could be mold or mildew built up in your unit caused by improper drainage or another source. You won’t want to leave the smell unattended for too long, as it is not only less than enjoyable, it could be impacting your home’s indoor air quality.
  • Leaking Liquid: Again with your senses, keep your eyes peeled for signs of an AC problem. It’s usually rather easy to spot when you have liquid somewhere in your home, where it shouldn’t be; however, an AC refrigerant leak may appear within the unit, so it’s not super easy to detect. If you notice colored stains or liquid near your air conditioner, you likely have an issue. While it is okay to see some condensation on the outside of the unit, there should never be excessive moisture or colored stains.
  • No Cold Air: Another common AC problem people face is when they hear their AC running, but don’t feel any air coming out, or the air is warmer than usual. If your air conditioning is blowing warm air, there is a reason, and some are easier than others to identify and fix. As mentioned above, check your thermostat for any issues and make sure you have clean unobstructed air filters. If both your thermostat and air filters are in good condition, there could be an issue with your condenser, refrigerant, air ducts, or something else.


The majority of common AC problems are caused by a lack of maintenance. Dirty air filters, in particular, are to blame for a number of issues, including frozen evaporator coils and the blower motor overheating.

AC routine maintenance is the most important investment you can make for your air conditioning system. This not only includes replacing the air filter every 1 to 3 months, but it should also include professional inspections and tune ups as well.

At Bragg Plumbing Heating & Cooling we can help. If you are having trouble with your air conditioner, don’t hesitate to contact our Marin, Sonoma, and Napa County AC repair technicians for professional troubleshooting. We will take the time to explain what’s causing your cooling problem and discuss your options for repair.

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