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Air Conditioner Not Working? Here Are 10 Reasons Why

You must understand why your air conditioner is not working before you ask someone to fix it. The devil is in the details; knowing the root cause can help you avoid unnecessary expenses.

Before you go on and seek help from a local heating service company such as Smart Air Cooling and Heating, it is important to understand the underlying reasons why your air conditioner is not working. If you want to figure out what is wrong with your AC, you should learn all about the most common AC problems and how to fix them.

In this article, we will explore just that.

Here Are 10 Common AC Problems, Their Causes, & Remedies

Before proceeding with AC contactor troubleshooting, you need to understand the problem with your home split/window AC unit. Here are 10 typical causes of malfunctioning in AC units:

#1) Thermostat Batteries Are Dead

In most cases, the common AC problems are easy to fix. You just need to know why your system is not working, and the solution will present itself. In this case, you’ll simply have to replace the thermostat batteries.

A technician from Smart Air Cooling and Heating opens a top hatch compressor to observe AC problems

#2) The Indoor Disconnect Switch Is Off

“Have you tried turning it off and back on again?” In many cases, people try to diagnose a seemingly broken air conditioner for a solution, even though the actual issue is a switch that was left off.

#3) The Outdoor Disconnect Switch Is Off

This is another common reason why ACs stop working. It can happen even if nothing's wrong with your system. Window air conditioner troubleshooting can often reveal benign issues like the outdoor disconnect switch being off.

#4) Circuit Breaker Tripped

Circuit breakers often trip to prevent damage to the appliances, so it is important to understand how to troubleshoot air conditioners thoroughly. This way, you can find out whether or not it's a tripped breaker that's causing troubles.

#5) Blown Fuse

A blown fuse is also among the most serious AC problems and solutions; a prompt diagnosis can help you get the system working soon.

#6) Blown Transformer

Maybe the problem is not with your AC at all. Perhaps the transformer was blown due to electrical overload, and if that is the case, you'll have to replace it. 

#7) Capacitors Fail 

Failure of capacitors can also lead to your AC not working at all, and this is part of every AC troubleshooting guide. If you’re not certain if the capacitor has failed, you can rule out other options with your diagnosis, and seek professional help to find out what is wrong specifically.

#8) Coils Are Dirty

The AC coils are also instrumental to the functioning of AC systems, you can figure out whether or not your AC coils are dirty/stuck during your window AC troubleshooting. Interrupted and dirty coils can lead to AC failure if there is nothing else wrong with your system, and you may be wondering how you can fix that – it’s better to leave it to the professionals. Regular maintenance is key to maintaining a perfectly functional and optimally running AC.

#9) Dirty Filter

This is another consequence of improper maintenance or ignoring maintenance needs altogether. Before you proceed with your air conditioner thermostat troubleshooting routine, it is important to see how the filters are doing – if you didn't clean them regularly, you probably know the answer. Dirty filters can render even the most capable ACs useless – even the ones with self-cleaning capability must be cleaned regularly to avoid putting stress on the system.

#10) Damaged Components

Lastly, if nothing else seems to be the issue, then some integral part of the AC is probably damaged; this may include a leaky compressor, damaged coils, broken exhaust unit, and so on.

Hopefully, by now you have somewhat of an idea about how to diagnose home AC problems and will be able to see what’s bothering your air conditioner if it is not working properly.

A man holding a dusty air vent in his hands; this may lead to the air conditioner not working

AC Not Working? Time to Call Smart Air!

Is your air conditioner not working? By now, you probably have an idea of what the underlying AC problems are with your unit. Once you explore the causes, air conditioner troubleshooting will be simple. But the more important thing to understand here is that only a reliable local contractor can fix your AC thoroughly. Smart Air Cooling and Heating is a widely trusted AC repair company; we serve all major Austin areas, including:

  • Westlake 
  • Rolling Wood 
  • Dripping Springs
  • Buda

Contact us now for quick and thorough service!