Noisy AC Units: Identifying the Source

By Admin / August 13, 2015 / Daily IT Bulletin
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Noisy AC Units in AustraliaYour air conditioning unit is an integral part of your home, providing you cool air during the hotter summer months. You can argue that it’s now a necessity, especially in Australia where temperatures can soar well beyond tolerable levels.

In many places like Perth, air conditioning units are subject to more than just regular wear and tear.  As one of the hottest places in the country, prolonged usage plays a role in its continuing degradation. When it starts making noise, it may be an indicator that something’s wrong with the unit.

Screeching and Cracking

If you hear your unit screeching, there may be a problem with its drive belt. For newer models that don’t use a belt-driven motor system, it may also be due to the bearings being loose. Changing the drive belt and tightening the bearings usually solves this problem.

A cracking noise, on the other hand, means that there’s something wrong with the unit’s air ducts. You’ll usually hear this after you turn it off and is usually due to temperature changes. Sometimes, warm air finds its way inside the unit’s air ducts, which causes it to expand. When you turn the unit on, the ducts contract again, which is what causes the noise.

While this problem is relatively harmless, it’s a good idea to check the air ducts for dirt and debris, especially if the cracking noise is unusually loud. Clogged air ducts, after all, can cause more problems in the long run.

Hissing Noises

Hissing noises indicate a more serious problem within your AC unit, with the most common causes being internal leakage or too much pressure on the compressor. If you hear bubbling sounds coming from within the unit, then the Freon may be leaking already. It’s important to address this immediately as the escaped coolant can ice build-up.

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If the hissing noise is very high-pitched, then turn off your air conditioning unit immediately and have a professional take a look at the unit’s compressor. Don’t attempt to turn it back on unless you want it to break down entirely.

These are just some of the common noises your AC unit may make that you need to be wary of. It’s important that you find the source and address the problem immediately to avoid costlier repairs.

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