Your Ducted Air Conditioning System Will Rarely Shut Down Without Warning. But before it utterly breaks down, other problems usually start to pop up, quietly eating away at your energy bills, airflow, cooling performance and overall operating efficiency. People still notice these changes but put off getting them fixed, thinking the system is just aging normally. And that delay can end up costing you big time.
Across Australia, where heating and cooling are responsible for a whopping 40% of the average household energy bill, the pressure on central climate systems just keeps going up. And in regions that are getting hotter and more temperate, the stress on ducted systems just gets worse. Once the performance starts to slip, the impact is immediate. You’ll start seeing your utility bills shoot up and your system start to break down faster.
For households and commercial properties relying on all in one ducted heating and cooling port Melbourne all year round, being able to spot the warning signs early can mean preventing a major failure before it’s too late.
Rising Energy Bills Are Often One of The First Signs of a Sick System
One of the first signs that your ducted air con is on its last legs is a sharp increase in your monthly electricity bill. At first it might be a gradual creep, but before long it becomes almost impossible to ignore. When you start looking at the numbers in a thermodynamic study, what you see is that as your central compressor or fan motor starts to get worn down or develop friction, the system starts to become less efficient. So, it has to work a lot harder to do the same job. And that means your power consumption just shoots up.
The Air Conditioning and Mechanical Contractors’ Association reckon that if your dirty condenser coil or failing compressor is causing you problems, you could be looking at a 30% jump in power consumption, all while still trying to cool the same space. People often first notice the problem when their quarterly utility bills start to get way out of whack, even though everything else is staying the same.
Once your monthly energy bill starts to creep up at a rate of 15% or more, despite the weather staying the same, it’s likely your system is fighting against some internal restrictions. Things like restricted refrigerant flow, weakened heat exchange mechanics and a clogged fan assembly are all common culprits here.
Uneven Temperatures Across Rooms Are Often A Duct Problem
A system that’s working properly should be keeping every room at a stable temperature. But when that starts to slip, you start to see temperature differences between rooms. At first it might not seem like a big deal. One area stays cool and another one’s a bit warmer. But over time, that variation gets harder and harder to manage, especially at peak usage periods. If the temperature difference between separate zones starts to creep up to 2.5 degrees Celsius or more, it’s a strong sign that there’s a problem somewhere in your duct network. Research by the CSIRO has shown that duct leaks in Australian homes can cause thermal losses of up to 25% of what you’re trying to cool.
When Noises from Your AC Start to Get Your Attention
Most residential air con units keep pretty quiet when all is well. Indoors the sound pressure levels usually sit around 30 to 45 decibels, depending on just how fast the fan is spinning and which grilles are open. But once the noise levels start climbing above 55 dB or you start noticing odd noises that just won’t go away, you can bet the system is on the way to some serious mechanical failures. It really depends on what exactly is going wrong. You see, screeching or squealing noises are a pretty common complaint when the blower fan bearings are getting a bit worn out or are badly aligned. In other cases, a worn-out drive belt has lost its tension and starts to make these really piercing high pitched sounds that just get on your nerves.
Then there are the metallic rattling and thumping sounds. You know, the kind that make you think something is playing up. The truth is, these noises usually indicate that something is badly wrong. It could be loose internal bits, a failing compressor mount or even the fan blades whacking into some gunk that’s built up in the system. All of these can cause these rackety noises while the system just keeps on running. Leaving these noises to sort themselves out isn’t just a good idea, it’s a very bad one. Eventually the damage can get so bad that the system seizes up completely and you end up having to write it off.
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