Knowledge Builders

where are the coils in an ac unit

by Shaun Thiel Published 3 years ago Updated 2 years ago
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Your AC unit has two coils: the evaporator coil and the condenser coil. The evaporator coil is located in the air handler unit (indoors) and absorbs the heat and humidity from your home. The condenser coil is located in the outdoor portion of your unit and releases that excess heat from your home to the outdoors.Jun 26, 2019

Full Answer

How much does an AC unit cost?

Window air conditioners don’t typically require professional installation, and AC unit costs are as low as $150–$750. If your home doesn’t have any ductwork installed, mini-split air conditioners may be the best way to go. It allows you to control temperatures in each zone of your home.

How to clean AC evaporator coils inside house?

How to Clean Inside Coils on Central Air Conditioner?

  • Turn of AC from the thermostat.
  • Wear goggles to protect your eyes from debris and other residues.
  • Locate the access panel and remove it to get access to the evaporator coils.
  • Take a soft brush and start removing the dust buildup with it.

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How to clean AC coils?

However, the safety precautions for DIY cleaning remain the same as above:

  • Turn off the unit for some time to ensure that the refrigerant gets settled
  • Prepare a cleaning solution using a 3% commercially available hydrogen peroxide
  • Spray the cleaning liquid on the coil fins and leave it for some time
  • Please wait for it to evaporate (that will take a few hours)

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Why is my AC evaporator coil freezing up?

How to Fix a Frozen Evaporator Coil

  • Thaw the Coils. The first thing you should do is to let the coils thaw by turning the AC system off. ...
  • Check the Air Filter. If you notice that the air filter is clogged or dirty, that might be the cause of the problem. ...
  • Clean the Coils. ...
  • Call a Professional. ...

What are the coils on an air conditioner?

What are the two types of air conditioner coils?

Why is it important to keep air conditioner coils clean?

How does an evaporator coil work?

What is the coil of an evaporator?

How does a coil work?

How does a fan work in a refrigerator?

See 2 more

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How do you access air conditioner coils?

1:054:05AC Maintenance - How To Clean Your AC Evaporator Coil - YouTubeYouTubeStart of suggested clipEnd of suggested clipIn order to expose the coil we need to remove the exhaust vent first there's some screws that holdMoreIn order to expose the coil we need to remove the exhaust vent first there's some screws that hold it in place then we're going to remove this section of the outer. Housing. This will reveal the coil.

Can you clean AC coils yourself?

While there are a number of commercially available coil cleaning solutions on the market, air conditioner coils can be cleaned with a solution of a mild household detergent and water. The detergent and water mix is applied to the coil using a low-pressure sprayer.

Are AC coils inside or outside?

An evaporator coil is the part of an air conditioner or heat pump that absorbs the heat from the air in your house. It is located inside the air handler or attached to the furnace.

How much does it cost to replace coils in an AC unit?

Replacing your AC evaporator or condenser coil might, on average, cost around $1,200, with the typical cost range between $800 and $2,400 depending on the brand, your region and other factors. Labor alone makes up between $500 to $1,000 of the total cost—the part itself is not as expensive.

How much does a coil cleaning cost?

Condenser coil cleaning, the one located outside your home, happens during your annual AC tuneup for $75 to $200. As a separate service, duct cleaning costs $250 to $500 and covers the evaporator coil, located in the air handler inside your home.

How do I know if my AC coil is dirty?

3 Warning Signs of Dirty Evaporator CoilsPoor cooling. If your home doesn't feel cool enough no matter how long the air conditioner has been running, this is one of the most noticeable signs that your evaporator coil is dirty. ... Frozen coil. ... Longer AC runtimes.

Does cleaning AC coils really help?

It's important to keep the AC coils clean so that heat can exchange efficiently through the coils without being blocked by dirt and debris. A lack of routine maintenance on the coils can lead to higher energy bills and consumption or an overheating AC system.

How do I clean the outside AC coils?

Here's the right way to clean an outdoor coilTurn off power to the unit. ... Check the refrigerant pressure. ... Remove the outer casing. ... Rinse the coil down with water. ... Spray the coil with cleaning chemicals. ... Re-rinse the coil with water. ... Remove all debris from inside the outdoor unit. ... Check the refrigerant pressure again.

How do you clean condenser coils?

How to Clean Your Air Conditioner's Condenser CoilsInspect the Coils. Start by visually inspecting the coils for any noticeable damage. ... Remove Debris With a Coil Brush. ... Straighten the Coil Fins With a Fin Comb. ... Wet the Coils and Coat With Coil Cleaner. ... Wash Away the Coil Cleaner With Water.

How long do AC coils last?

As with any part of your cooling system, your evaporator coil will suffer from wear and tear over time. Efficiency gradually decreases throughout the coil's lifespan, but proper maintenance can keep your evaporator coil going for up to 20 years.

How long does it take to replace an AC coil?

On average, installing a replacement AC coil takes 2 to 4 hours. At $50 to $100 per hour for labor, a typical AC coil replacement costs $100 to $400 in labor.

How long should an AC unit last?

15 to 20 yearsWhile every unit is different, and every homeowner has a different understanding of when their central air conditioner is broken beyond repair, it's fair to say that, with proper maintenance and care, you can expect a good 15 to 20 years of cooling from a new high efficiency air conditioning system.

What can I use to clean my AC condenser coils?

As AC coils are typically made from copper or aluminum, they can be cleaned with water. Rinse the coils on any outdoor central AC unit by spraying with water from your garden hose on a low setting.

Is it OK to spray water on your air conditioner while running?

The good news is that you absolutely can spray water on your air conditioner if it needs a cleaning, and nothing bad will happen. Spraying water on your AC's condenser also helps it run more efficiently. In fact, your condenser needs a regular spritzing in order to keep doing a good job.

What can I use to clean my AC evaporator coils?

Mix warm water and a simple detergent in a spray bottle, hand sprayer, or garden sprayer. Apply the water and detergent solution to the evaporator coils. Give the solution a few seconds to a few minutes to soak in and loosen debris. Reapply as needed.

How long before I can turn on AC after coil cleaning?

If the cleaner label instructs to rinse off foam, use a garden hose on low-pressure settings. For indoor coils, you can use a rinse-free cleanser. After rinsing the coils, don't turn on your air conditioner immediately. Let the unit dry for 30 to 60 minutes.

What types of coils are in AC Units?

In a central air conditioner, there is an indoor unit (typically a furnace and evaporator coil or fan coil) and an outdoor unit (often referred to...

Why is it important to clean AC coils?

Due to the tight spacing between the coil fins, surface moisture from the cooling process, and the amount of air that flows across them, dirt, dust...

How often should AC coils be cleaned?

As common sense would dictate, AC coils should be cleaned when they’re dirty. But how quickly they get dirty depends on how often you use your air...

Can air conditioner coils be cleaned with household detergent?

While there are a number of commercially available coil cleaning solutions on the market, air conditioner coils can be cleaned with a solution of a...

Is AC coil cleaning cost-effective?

Considering the extended system lifespan, sustained energy efficiency, lower operating costs, better comfort and reduced potential for extensive re...

Can AC coils be cleaned with compressed air?

Yes. Your dealer may use a combination of using compressed air, a shop-vac and heavy-duty coil-cleaning chemicals that meet the specifications of y...

Where Is The Condenser Coil Located On A Central Air Conditioner?

The condenser coil is located directly behind the condenser “fins” on a central air conditioner.

How Often Does The Condenser Coil Need To Be Replaced?

So to minimize cost-utility and maximize energy efficiency, We should clean the AC condenser coil once a year.

Where are the condenser coils located?

Condenser coils are located outside the building an air conditioner services. In this section of the system, the gaseous coolant is pressurized and turns back into a liquid. This process creates heat, which exhaust fans blow outside. Fans and vanes are used, and the coil typically made from copper.

What are the components of an air conditioner?

Evaporator and condenser coils are important components of an air-conditioning system, based on simple but effective principles. Understanding how these parts work can give homeowners a greater appreciation of their air conditioners and help them understand to maintain them.

Why are evaporator coils copper?

Evaporator coils typically are copper, because it transfers heat easily. Fins or vanes surround the evaporator coil to create a greater cold surface area to cool air. Cleaning the evaporator coil is essential to ensure an HVAC system works efficiently.

What is the difference between an expansion valve and a compressor?

An expansion valve reduces pressure on liquid coolant. An evaporation coil allows coolant to become a gas, which absorbs heat from the surrounding air. A compressor pressurizes the gaseous coolant. A condenser coil forces the gas to become a liquid, expelling heat into the surrounding air. The expansion valve and compressor are relatively simple ...

How does an air conditioner work?

Air-conditioning systems are somewhat complicated. They consist of multiple parts and systems working together to cool a building. While fans and ducts move cold air throughout a house , refrigerants move through parts of the air conditioner to cool that air.

What is Cardinal Heating and Air?

Cardinal Heating & Air is the leading HVAC company in our Greater Seattle and Eastside cities because of our excellent workmanship and industry-leading products.

Where does the heat absorption happen in an air conditioner?

Actually, air conditioners absorb heat from inside a building and move it outside. This absorption happens in and around the evaporator coils, which are located inside the building.

What is the coil on a split system air conditioner?

In a split-system central air conditioner, there is an indoor unit, typically a furnace and evaporator coil or fan coil, and an outdoor unit, often referred to as the air conditioning unit. Each of these units houses a coil that is vital to the air conditioning process. Inside the home, the evaporator coil, sometimes referred to as the cooling coil, is located on the air intake side of the fan coil or the outlet side of the furnace. Its job is to remove heat from indoor air so the blower fan can return cool, refreshing air to the home.

How does compressed air work on outdoor coils?

When cleaning an outdoor coil with compressed air, an HVAC dealer will blow the air through the coils opposite the direction that air flows through the coil during normal use. This will result in pushing air through the cleaner side back through the dirtier side.

Why Is It Important to Clean AC Coils?

Due to the tight spacing between the coil fins, surface moisture from the cooling process, and the amount of air that flows across them, dirt, dust, debris and other pollutants can build up on the coil surfaces. Over time, this buildup reduces the system’s ability to transfer heat into and out of the home, thus reducing your system’s ability to provide summer cooling. In more extreme cases, dirty coils can also hinder or block the airflow that is so important to the entire process. This can result in having a less comfortable home and rising utility bills due to the lost energy efficiency. Even worse, dirty coils make the system work harder than intended and can result in shorter system life and potentially expensive repair bills. In short, the cleaner the air conditioning coil, the more efficient the system will operate.

Why is my air conditioner compressor running at high temperatures?

Increased system wear. A blocked evaporator coil often causes the compressor to run at increased temperatures, placing stress on the entire system. Because the compressor is one of the highest-cost replacement items within the air conditioning system, protecting the compressor can help you avoid expensive repair bills.

Why are coils important?

Because air conditioner coils are so vital to your comfort and efficient system operation, getting the job done right is important. And due to the delicate nature of the coil fins that help the heat transfer process, making sure they don’t get damaged during cleaning is also very important.

Why do you need to clean your air conditioner coils?

Air conditioner coil cleaning can help you save money , maintain efficiency and extend the system’s life expectancy.

Why do you need to clean coils?

Because the coils play such a crucial role in the cooling process, keeping them clean helps to ensure the long-term health of your air conditioning system. While it may look like a potential DIY project, the easiest and best way to clean your coils is to have an expert do it.

What is AC coil?

The ac evaporator coil is an important component to your central air-conditioning system and it plays a vital role in keeping your home cool. When there's a problem with your ac evaporator coil, you'll definitely notice.

What shape is the AC coil?

Let's take a closer look: As you can see from the above image, the AC evaporator coil is typically upright in an "A" frame shape.

What is a AC Evaporator Coil?

When you think about air conditioning, cold air is probably one of the first things that comes to mind. The cold air delivered actually comes from the evaporator coil. But if you're like most people, you probably think that your AC system is cooling the air, but in reality, heat is being removed.

How Long Do Evaporator Coils Last?

In theory, there is no reason why your evaporator coil won't last as long as your HVAC system. But this, of course, assumes that you are providing proper care. If you neglect your evaporator coil, you'll most definitely need to replace it at some point.

How much does it cost to replace an evaporator coil?

Replacing your evaporator coil isn't cheap. On average, it'll cost about $1,000, but depending on the size and make of your system, it could be as low as $600 or as high as $2,000.

What is the coil of an evaporator made of?

The evaporator is where the cold air actually comes from and the coils are made from metals that easily conduct heat. Frequently the coils are made from copper, but steel and aluminum is also used. The tubes are bent into "U" shapes and are stacked into a panel. There are several steps that take place to cool the air.

How does an evaporator coil work?

The evaporator coil works when air flows over a series of thin metal fins that are cooled by the refrigerant within the copper tubing. Technically, the evaporator moves the heat from the air into the refrigerant and the cooled air is then blown into the home through the ductwork.

Where is the evaporator coil located?

Locating the Evaporator Coil Inside Your AC. For those who are curious about where the evaporator coils are in an air conditioner, these are the coils, made of either copper, steel, or aluminum, inside the air handler. The air handler, also called the blower, has the components responsible for moving air around your home.

Why is it important to manage your AC coil?

Therefore, it is essential to learn how to manage your AC’s evaporator coil to enjoy cleaner and cooler air for a long time.

Why does dirt enter the coils of an evaporator?

The explanation of why dirt enters the evaporator coils is that the air filters are still full . It is simple: a dirty air filter won’t do its job efficiently.

What is the responsibility of an evaporator coil?

Its responsibility is mainly to absorb the heat from the air inside your home, thereby reducing humidity in the air. In this article, learn where to find the evaporator coils of your air conditioning unit, as well as the importance of having this knowledge.

How does an evaporator coil work?

The evaporator coil works by removing heat from the air to decrease the air temperature as the air flows over your house. The same approach allows the humidity to condense, thereby helping to dehumidify the household’s indoor air supply. The refrigerant moves from there to the exterior unit of the HVAC system from the evaporator coils.

Why is an HVAC evaporator coil important?

In the heat transfer process, and HVAC evaporator coil is crucial. This is because it provides a pleasant indoor temperature when the weather is too humid.

Why should you watch the evaporator coil?

The evaporator coil is among the things you should watch, mainly because it corrodes over time.

Where is the condenser coil located?

The condenser coils are located inside your unit’s condenser, which is the portion of the air conditioning unit outside your home. The condenser is responsible for turning refrigerant into a hot, highly pressurized gas. This gas then flows through the condenser coils, which are all in the path of blowing air, so the heat from your home is released.

What is an evaporator coil?

An evaporator coil is the component of your heat pump or air conditioner that absorbs the heat and moisture from the air inside your house. It works alongside the condenser coil to produce cool air and complete the heat exchange cycle.

Where is it located?

The AC evaporator coil is located inside the portion of the air conditioning unit that sits inside your home and should only be accessed by a trained HVAC professional.

How do you know if your evaporator coil is bad?

There are some telltale signs that let you know when you should hire an HVAC technician to inspect your evaporator coil . You may have a bad AC evaporator coil if your unit is:

What does it mean when your evaporator coil is dirty?

A dirty evaporator coil could mean living in a higher temperature environment. Contact a licensed HVAC technician to keep your AC unit in optimal condition.

How much does it cost to replace an evaporator coil?

Not having to replace your coil can be a good thing for your bank account! Evaporator coil replacement costs can range anywhere from $600 to $2,000, depending on whether your unit’s under warranty or not, according to Costimates. If an HVAC technician is able to repair an evaporator coil without fully replacing it, your wallet is in luck.

What happens if your AC coil is dirty?

If your AC evaporator coil is dirty, but still functioning, don’t push it off to address later. A dirty, yet still functional, evaporator coil takes a longer time to cool your home and causes lower air quality overall.

What is an evaporator coil?

What exactly is an evaporator coil? This coil, also known as an indoor coil or coil, is the part of your air conditioner that regulates the temperature in your house all year long. The coil does this by absorbing the moisture and heat in your home. There can be no cold air without the evaporator coil. It works with the condenser coil that removes the heat from the refrigerant.

What to do if your AC coils are bad?

It’s best to contact an AC expert, like Art Plumbing, AC & Electric, who can evaluate what is wrong with your HVAC system. If it’s the coils, then they can advise you if replacing the co ils or the whole unit is the best solution.

How long does an AC last?

The average lifetime of an AC is approximately 10 to 15 years. After 15 years, your AC unit will break down more often. If you just serviced your unit a few months ago and something broke afterward, it may be time to replace it.

Can you replace only one coil in an AC?

Replacing only one coil can cause significant issues with your AC. Just replacing the evaporator coil can make it an incompatible match with the condenser coil. If they mismatch in refrigerant, SEER, or age, problems could occur such as inefficient temperature regulation, high electric bills, frequent repairs, or a decrease in the lifetime of your AC unit. SEER refers to the efficiency rating of your AC.

Should You Replace the Coil or the Entire Air Conditioning Unit?

Sometimes replacing only the coil is possible. Often, it’s better to purchase a new AC because there are two AC coils in each unit. There is the evaporator coil or inside coil, and then there is an outside coil or the condenser coil. They are separate components but work together to regulate the temperature in your home. Often replacing the AC is much more cost-effective for several reasons.

What are the coils on an air conditioner?

In actuality, an air conditioner has coils of two kinds: an evaporator coil and a condenser coil. Knowing the difference can help you assess the health of your air conditioner and keep your system in good working order.

What are the two types of air conditioner coils?

The Two Types of Air Conditioner Coils. As we have noted, there are two kinds of air conditioner coils at work in any cooling system: the evaporator coil and the condenser coil. In general, what these coils do is distribute heat.

Why is it important to keep air conditioner coils clean?

Any kind of grime or coating affects the ability of the coils to transfer heat, undermining your air conditioner’s ability to work efficiently.

How does an evaporator coil work?

The two types of coil work together to cool air in the following steps: 1 The evaporator coil inside your indoor unit contains extremely cold refrigerant. As air is forced over it, the coil simultaneously cools the air while absorbing heat into the refrigerant. 2 From there, the heated refrigerant inside this coil travels out to your outdoor unit. 3 Here it passes through a compressor, which condenses the refrigerant into a hot gas. 4 This pressurized gas is then fed through the condenser coil. 5 A fan blows air over this coil, absorbing the heat from the refrigerant and cooling it. 6 The hot air is expelled outside, while the refrigerant heads back inside through an expansion chamber to cool further and restart the process.

What is the coil of an evaporator?

The evaporator coil inside your indoor unit contains extremely cold refrigerant. As air is forced over it, the coil simultaneously cools the air while absorbing heat into the refrigerant.

How does a coil work?

Instead, they are arranged to maximize the surface exposed to air. So, the “coil” is a length of metal tubing bent back and forth along a grid to create a large surface for heat transfer. The two types of coil work together to cool air in the following steps:

How does a fan work in a refrigerator?

This pressurized gas is then fed through the condenser coil. A fan blows air over this coil, absorbing the heat from the refrigerant and cooling it.

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The Physical Property Behind Air Conditioners

  • Air conditioners rely upon a physical property of gases to cool air: When pressure on a gas is lowered, the gas expands and cools; if a gas is put under more pressure, it increases in temperature. These two phases are evaporation and condensation. This physical property of the coolants used in air conditioners allows them to cool air without ever needing to be refilled or re…
See more on cardinalheating.com

Evaporator Coil Function and Maintenance

  • Most people believe that an air conditioner manufactures cold air and blows it into the house. Actually, air conditioners absorb heat from inside a building and move it outside. This absorption happens in and around the evaporator coils, which are located inside the building. Liquid coolant inside the evaporator coil expands and becomes a gas. This absorbs heat from air that a fan blo…
See more on cardinalheating.com

Condenser Coil Function and Maintenance

  • Condenser coils are located outside the building an air conditioner services. In this section of the system, the gaseous coolant is pressurized and turns back into a liquid. This process creates heat, which exhaust fans blow outside. Fans and vanes are used, and the coil typically made from copper. Condenser coils need to be kept clean of dirt and ...
See more on cardinalheating.com

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