4 common AC faults you should be aware of

4 common AC faults you should be aware of

Like any other appliance, air conditioners can run into problems now and then. They’re not always obvious, though, so knowing what to look out for can help you address small faults before they become a bigger problem. To get you on the right track, we look at 4 of the most common AC problems you should be on the lookout for.

1. Refrigerant leaks

If your AC is low in refrigerant even after a top up, you may have a leak. Making sure that your refrigerant is at the right level is key to prolonging your AC’s lifespan and overall performance. Unmanaged, a leak can result in:

  • Low efficiency, resulting in much higher power consumption
  • Inconsistent cooling
  • A frozen evaporator coil, and
  • The compressor being damaged.

There’s also a chance a leak may pose a risk to your health (as well as the environment’s!), so getting it fixed should be a priority.

2. Sensor issues

Your air conditioner cycling constantly or turning on and off without warning can indicate a failed thermostat. This sensor, located behind your AC’s control panel, measures the temperature of air coming into the evaporative coil and adjusts ambient temperature accordingly, so it’s important it stays in as good a condition as possible.

3. Grime build-up

With all the hard work ACs get up to, they – unsurprisingly – get dirty over time. The problem is that dirt accumulates internally, so knowing when to clean those grimy filters isn’t always obvious. While a little bit of grime accumulating internally might seem harmless, dirty filters and coils can put a lot of unnecessary strain on your unit. This can cause your AC’s fans to fail a lot sooner than they ought to, which is why inspecting those filters is on the regular is so important.

4. Electric control failure

Even doing something as simple as turning your AC on and off frequently can cause its fan controls and compressor to wear out prematurely. These worn-out components can cause a connection problem that prevents the compressor from turning on altogether – which is the last thing you need when the mercury rises!

When it comes to your AC, prevention is better than cure

AC issues can often be prevented by keeping an eye on telltale problem signs. When using your AC, look out for things like:

  • Poor performance
  • Leaking (leaks are often normal, but they can suggest a problem)
  • Odd noises (such as thumping, hissing, buzzing, rattling, or banging), and
  • Strange smells.

Diagnosing the problem yourself isn’t easy, as these signs can often relate to several common faults. Instead, any warning signs may suggest you’re overdue for an air-conditioner service. And if that is the case, our experts are always happy to use our decades of experience to ensure your AC is in tip-top condition for the warmer or cooler months.

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Vaccaro team have always been excellent to deal with because of the Professional team they employ.They have the right experience to cater for all types of builds, there communication is outstanding from Melinda and Rose at the Consultation stage, Anthony there onsite Supervisor and the electricians that have been working on my Homes.
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Melinda assisted me with planning the layout of my home electrical plan. She was friendly and excellent with providing many options for light fittings and lighting placement in the home. Highly Recommend!

Jeff L

Fantastic service the whole way through, booking the job was easy and the electricians who completed the work were friendly, took all required safety measures and the price was more than reasonable. Definitely recommend using Vaccaro.

Roger L

Vaccaro was the original electrical installer of my home. Their workmanship and materials were of excellent quality. They were extremely helpful, efficient and friendly whenever I asked for help. My special regards to Cameron for responding to my after-sales requests promptly and Robert for helping me resolve some technical issues and enhancing my understanding of the wiring system design.

Vaccaro was also the original air-conditioning installer of my home. Sonya and her teams were very polite and attentive and provided speedy responses to servicing requests. The technicians are well trained and equipped and as a result the refrigerant leak was fixed in no time. They also made good the controls and carried out air balancing.


I was a little nervous doing my electrical appointment on my own as my partner was unavailable. Janae (Electrical Design Consultant) was friendly, helpful and had a clear understanding of everything, making the electrical appointment stress-free. Janae was quick with responding to any enquiries or emails. I was very happy with her service & would highly recommend.


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Richard was reliable, responsive and polite. He also took special care to make sure I was happy with the service provided. Thank you very much, would not hesitate to recommend.


Happy to give a big thumbs up and thank you to Richard in the sales team and the guys who replaced our 22 year old full ducted system in our double storey home, with a new Daikin 20kw system. Only installed one day and already appreciate how quiet the unit is. Despite the rain they were through the job in a few hours and were completely professional, very happy to recommend this company.


Thank you, Richard, Jimmy, and the rest of the Vaccaro team, for providing such timely and professional service, installing a split air conditioning system in my home today. Jimmy’s level of awareness to be respectful of the peace and cleanliness of the property during the installation was greatly appreciated. My apartment feels lovely and toasty – I may never leave!


Had a recent appointment with Belinda to organise the electricals for my first home build. She was professional, knowledgeable and extremely helpful with assisting me pick the best electrical option for the built. I’m super excited and can’t wait to see the quality of work from Vaccaro Group!!

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