Patching an Old HVAC System
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Patching an Old HVAC System

When I married my husband ten years ago, I reluctantly agreed to move into the older brick home he already owned. I knew the house was outdated. Unfortunately, I didn’t have any experience renovating an older place. Immediately, I noticed the old central air conditioning unit in the home. After thoroughly inspecting the equipment, I was afraid the ancient unit wouldn’t make it through my first summer in my new place. Thankfully, I was wrong. After ten years, this same air conditioning system is still running smoothly. However, it has received some diligent care from a reputable HVAC contractor over the years. On this blog, you will discover the ways an HVAC contractor can restore an older air conditioning unit.


Patching an Old HVAC System

Beyond Normal Noises: Other Causes Of AC Noise

Mary Gonzalez

A typical air conditioner (AC) has multiple moving parts, and the movements must produce some noise. Don't forget that the AC also moves air, which also produces a little noise. That is why a little hum from your AC is normal. However, you should suspect a malfunction if your AC is emitting strange noises. Below are some of the possible causes of AC noises.

Loose Parts

The various parts of an AC, such as fan motor or belts, are usually finely tuned and adjusted for optimal movements. The adjustments reduce the noises that these parts would otherwise make. If these parts loosen, their sound levels also go up. The loosening can happen due to various reasons such as wear and tear, accidental damage, or poor repair or maintenance.

Damaged Parts

As previously mentioned, the AC consists of different moving parts. Damage to any of these parts interferes with efficient movements by increasing friction. Damages can also cause unwanted contact between different parts of the system. For example, a bent fan can touch other parts of the AC, and a torn fan belt can rub against the pulley. Any of these can result in increased noise levels. 

Foreign Objects

Foreign objects caught in the AC can also trigger noises. For example, tree twigs, toys, or pebbles in the condenser can make noise as the condenser fan rotates. Such noises usually appear after a storm, landscaping project, or renovation project since such projects usually kick up considerable debris some of which ends up in the AC.

Inadequate Lubrication

The more friction there is between its moving parts, the noisier your AC will be. One way of dealing with friction, and by extension noise, is to lubricate the appropriate parts. That is why AC units need to be periodically lubricated as part of their maintenance. If the lubrication dries up, however, the friction will increase and the AC will be noisy. This is usually the case with poorly maintained AC units. 

Poor Design and Installation

Though rare, it is also possible for poor AC design or installation to make an AC noisy. For example, failure to properly secure the outside unit to its base can make it rattle whenever you switch on the system. Another example is a poorly designed duct system that can trigger high air pressure or fluctuating air pressure within the ductwork, which can be quite noisy too. 

You should not run a noisy AC for too long since that might worsen the problem. Consult an AC technician to diagnose and fix the system if it is too noisy. A local company such as I C E Heating & Cooling can provide more information.