Air conditioning systems play a vital role in maintaining indoor comfort, especially during scorching summer heat. However, one common issue that can affect AC units is coil leakage, which can result in decrease in cooling efficiency and higher energy costs. AC coil leakage occurs when coils in the unit develop cracks or holes allowing refrigerant to escape. This not only compromises the performance of the system but also poses environmental risks due to the release of refrigerants. This article explores the types of AC coils and also the causes, signs and solutions for AC coil leakage to help you address this common problem effectively.
Table of Contents
Types of Coils Commonly Used in AC Units
AC coils are crucial components of your AC unit as it performs the continuous task of circulating refrigerant between the indoor and the outdoor unit. The two types of coils used in an AC unit are:
Evaporator Coil:
This is usually mounted in the indoor air handler and is the component that receives warm airflow through the ductwork extended in the house. The frigid 40 degrees refrigerant then absorbs heat from the indoor air moving through the coil passages. This absorbed heat causes refrigerant circulating through the coil to convert into warm vapor. This vapor leaves the evaporator coil through a conduit to the outdoor unit and into the system compressor.
Condenser Coil:
Most outdoor units have a condenser coil alongside the compressor and condenser fan. Evaporator coil vapor is converted into hot gas when it reaches the system compressor. In the condenser coil, the pressurized gas rapidly depressurizes and releases its heat Air pulled through coil passages by the condenser fan disperses the heat into outdoor air. Then the flow of refrigerant circles back to the indoor evaporator coil, and the cooling cycle continues.
Causes of AC Coil Leakage
You might be wondering about the exact causes of leaking AC coils. Before we go into this, one thing you have to understand is that AC coil leakages are common and normal occurrences. So let’s see some of the causes of these leakages below:
Corrosion:
This occurs when copper tubing inside the evaporator coil reacts with water and volatile organic compounds(VOCs), to form formic acid. VOCs can be found in many of your household chemicals, including cleaning detergent, personal care products, and even the materials used to build and furnish your home. This chemical reaction gradually wears down the copper tubing, creating weak spots where leaks can develop.
Vibration:
Vibration from air conditioners can lead to AC coil leakage when it causes the aluminum fins to rub against copper tubing. Over time, this friction can wear down the tubing, creating holes and weak spots where leaks could occur. This issue is particular in older units and it gradually compromises the integrity of the coils.
Poor installation:
Poor installation of AC units can cause coil leakage due to inadequate fittings and sealing. Units with incorrect installed components create weak points in the system where leaks can develop over time. While improperly sealed connections allow moisture and contaminants to infiltrate the coils, accelerating corrosion and degradation.
Clogs:
Clogs in the AC drain line can lead to coil leakage as excess condensation backs up due to obstruction by dirt or insects. When the drain line is blocked, water cannot flow out as intended, causing it to accumulate within the system. Over time, this buildup can result in pressure on the coils, leading to leaks and potential damage to the AC unit if not addressed promptly.
Mold:
Mold and biofilm thrive in the damp environment and they can form on the copper tubing of the coil weakening its integrity. As mold accumulates, it creates a barrier that traps moisture which increases corrosion. Eventually, this corrosion weakens the coil’s structure, causing it to develop leaks.
Effect of AC Coil Leakage
AC coil leakage has the following effects on your AC unit:
Decreased Cooling Efficiency:
Leakage in your AC coil can cause refrigerant to escape which leads to decrease in cooling efficiency. This means that your AC will struggle to maintain your desired temperature, resulting in longer cooling cycles and higher energy bills.
Increase in Energy Consumption:
As the AC system works harder to compensate for the lost refrigerant, it consumes more energy which will definitely result in an higher electricity bills.
Compressor Damage:
Low refrigerant levels due to coil leakage can cause the compressor to work harder and overheat. This could potentially lead to extensive damages in the compressor and in some cases, it totally refuses to turn on.
Icing:
In some severe cases, coil leakage can lead to icing on the evaporator coil. This occurs when the refrigerant pressure drops too low, causing moisture in the air to freeze on the coil. Icing restricts airflow and further reduces cooling efficiency.
Health Issues:
An AC coil leak can lead to health issues due to mold and mildew growth, circulating through the air. It is possible to get respiratory problems, allergic reactions, and aggravation of asthma from mold exposure. Also, refrigerant leaks can release harmful chemicals, which may cause headaches, nausea, and dizziness. For health reasons, it is imperative that ac service in noida is handled promptly.
Solutions for AC Coil Leakages
If you’ve discovered that you have a leaky AC coil, the following are some ways that it could be fixed:
Repair Vs Replacement Consideration:
AC coil leaks require replacement, which is always the most feasible option. As a result, the air conditioner coil leak repair cost could rise from Rs. 2500 to Rs.4500 almost as much as replacing the coil. If you still want to repair an AC coil leak, you should consider these factors: Firstly, the extent of the leakage determines if it’s feasible to repair the coil or if replacement is the only option.
Additionally, the age of the unit and the cost-effectiveness of ac coil leak repair versus replacement play a crucial role. If the leak is minor and the unit is relatively new, repair might suffice. However, significant leaks in older units often warrant replacement to ensure optimal performance and efficiency.
Temporary fixes Vs Long Term Solutions
Adding Refrigerant:
When your AC coil leaks, refrigerant escapes, causing cooling inefficiency. Adding refrigerant to your AC system provides a temporary but pricey solution. Although not permanent, it buys you time to find a lasting fix. This replenishment allows the AC unit to continue producing cool while you explore more permanent solutions. However, neglecting the root cause of the leakage can result in internal damages to the system.
Using a Sealant:
Using sealant is another method of AC coil leak repair. This sealant is designed to travel with the refrigerant, sealing leaks in evaporators, condensers, joints, and copper lines. While it’s a viable solution, it has a success rate of 50/50 for small to moderate leaks, and it often requires multiple applications for effectiveness.
Long Term fix. Replacing the Coil:
Replacing the coil is the best solution for AC coil leaks. Whether your AC unit is covered by warranty or not, investing in a new evaporator coil reduces the risk of high ac coil leak repair cost and enhances efficiency.
Conclusion
AC coil leakage can result from various factors such as corrosion, wear and tear, or poor maintenance. However, there are several solutions available to address this issue, including regular maintenance, adding refrigerant and replacing the coil. By understanding the causes and implementing appropriate solutions, you can ensure the efficient operation of your AC unit and avoid costly repairs in the long run. Remember, proper care and attention to your AC unit can go a long way in preserving its functionality and keeping your indoor environment comfortable.