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What Causes Refrigerant Leaks in AC Systems?

April 20, 2021 by Mike McFadden - A/C & Heating Specialist
Charging an Air Conditioning Unit with Refrigerant

A refrigerant leak is a serious problem that can lead to some uncomfortably hot days for you and your family.

If your AC system is leaking refrigerant, it will struggle to cool your home. It may provide some level of cooling power. Once most or all of the refrigerant has leaked out, however, your AC system will only produce room-temperature air.

So, what causes refrigerant leaks in AC systems exactly?

Overcharging

Overcharging is a common cause of refrigerant leaks in AC systems.

It may sound paradoxical, but filling an AC system with too much refrigerant may cause it to lose refrigerant. Charging refers to the process of pumping more refrigerant into an AC system. Overcharging simply means that too much refrigerant is pumped into the AC system.

With overcharging, AC systems become over-pressurized, which may cause them to leak refrigerant in certain areas.

Cracked Coils

Cracked coils can cause refrigerant to leak out of AC systems as well.

Most AC systems have an evaporator coil and a condenser coil. While they serve different purposes – the former collects heat from the air, whereas the latter releases heat – they both contain refrigerant.

If there’s a crack in either the evaporator coil or the condenser coil, refrigerant may leak out of it.

Corroded Lines

Another common cause of refrigerant leaks in AC systems is corroded lines.

Refrigerant lines are copper pipes that carry refrigerant between the coils. There’s a suction line, and there’s a return line. Because they are made of copper, though, they can corrode.

Over time, refrigerant lines can corrode and rust after being exposed to moisture in the air. Depending on the level of corrosion, this may cause them to leak refrigerant.

Excessive Vibrations

AC systems produce vibrations when running.

In some cases, these vibrations can wear down an AC system’s components to the point where it leaks refrigerant.

Vibration-induced leaks such as this aren’t particularly common, but it’s still something homeowners should consider when troubleshooting cooling problems with their AC system.

Factory Defects

Even new AC systems can experience refrigerant leaks.

Factory defects, for example, can cause refrigerant leaks in new AC systems. If a new AC system isn’t completely sealed, it will inevitably leak.

AC systems require dozens of parts, many of which house refrigerant. All of these parts must be completely sealed so that refrigerant can’t escape.

If you are experiencing a problem with your air conditioning or heating call us at 512-336-1431 to schedule an appointment. We’ll be glad to come out and take a look at the issue.

1431-183 A/C & Heating proudly serves Round Rock, Georgetown, Cedar Park, Pflugerville, Leander, Liberty Hill, and North Austin.

Category: Air Conditioning Systems

About Mike McFadden – A/C & Heating Specialist

Mike is a local Air Conditioning and Heating specialist based in Round Rock, Texas.

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