Repairing Guides

how to repair window air conditioner

by Christa Ferry Published 2 years ago Updated 1 year ago
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  1. Unplug the unit and carefully remove it from the window or wall. ...
  2. Remove the grille and filter and unscrew the metal cover (taking care not to damage the coil’s fins). ...
  3. Wash the filter thoroughly or replace it with a new filter. Most air conditioner replacement filters are readily available online or at appliance repair shops.
  4. Using a vacuum with a soft brush attachment, clean the coil’s fins. Remove all dust and debris.
  5. Clean up the unit with a rag, making sure all drains that allow condensed water to drip away from the unit are open. Allow it to dry thoroughly.
  6. Lubrication. While you have the unit apart, lubricate the motor and bearings if suggested by your owner’s manual.
  7. Finally, reassemble and reinstall the unit in the window. Get Free Bids Now! ...

Full Answer

How to fix a loud, noisy window air conditioner?

How to Fix Window Air Conditioner Compressor Noise

  • Check the Installation. While it’s easier to install a window air conditioner than it is to install through the wall air conditioner, there are some guidelines that you must follow ...
  • Clean Dirty Condenser Fan. ...
  • Inspect The AC Compressor. ...

How to uninstall your air conditioner from the window?

This step requires a drill driver or a screwdriver to complete the work. Once you’ve unfastened the retaining screws, the air conditioner will be free of its mount. You’ll need to have someone manage the unit to prevent it from falling out the window.

How to properly clean your window air conditioner?

Method 3 Method 3 of 4: Deep Cleaning an Air Conditioner Seasonally

  1. Remove the unit’s casing. Make sure the unit is off and that power is disconnected. ...
  2. Comb the aluminum fins. Use a fin comb or soft bristle brush to comb away dust and debris from the aluminum fins.
  3. Blow the coils and fan with condensed air. ...
  4. Vacuum and wipe down the tray. ...
  5. Store your air conditioner inside during cooler weather. ...

How to help a window air conditioner drain better?

Things You Will Need

  • Carpenter's level
  • Wire or baby bottle nipple brush
  • Thick cloths
  • Water hose
  • Screwdriver
  • Drill

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How do you fix a window air conditioner that is not cooling?

4:046:09Window Air Conditioner Not Cooling? EASY Common Fix - YouTubeYouTubeStart of suggested clipEnd of suggested clipWater there's a tray in the bottom you're gonna have some buildup in there. So this will speedMoreWater there's a tray in the bottom you're gonna have some buildup in there. So this will speed things along additionally. You're also gonna want to spend a few minutes to clean the outside casing.

What causes a window AC to stop working?

Dirty Fins and Coils Be sure to clean the coils and cooling fins through which refrigerants flow, which are narrow and tend to trap dust and debris. If the cooling fins or filters are dirty, the insufficient airflow can cause the unit to not turn on.

Can a window AC unit be repaired?

An easy DIY project A little maintenance means homeowners can save money on utility and repair bills. With the right information and access to replacement parts, you should be able to repair a window air conditioner yourself, saving the cost of a service call or replacing the unit altogether.

Why is my window air conditioner running but not cooling the house?

the most common reason why your split and window AC is not cooling is because of unclean air filters. If the AC filter is unclean or clogged with dust and dirt, it might result in various problems. It could interfere with the proper working of the thermostat.

How do I know if my window AC fuse is blown?

Start by testing the lines that bring in electrical power to the AC (in lines). The reading should be around 220 to 240 volts- This proves there is no problem with the power supply. Next, test the outgoing lines. If the reading is zero, then your AC fuse is blown.

Is there a reset button on a window air conditioner?

Since most window air conditioners do not have a reset button, you'll need to unplug it for a few minutes to dissipate the charge. After plugging it back in and turning the circuit back on, the window AC unit should reset and be operational again.

How long should a window AC unit last?

about eight to 10 yearsA great window air conditioner can keep a room cool and comfortable throughout the day, even during a summer scorcher. It can also last a long time before it has to be replaced. Generally, window air conditioners last about eight to 10 years.

What is the life of a window AC?

Your window air conditioner is old On average, window units last around 10 years. That means if your older window unit is acting up in any way or just not performing the way it used to, it's probably time to get a new one.

Do window units run out of freon?

Window air conditioning units are used by many to cool apartments, homes, RVs and offices. These units use freon to create cool air. The freon is sent through a sealed tube, and should not run out. However, units get old and can develop leaks.

Should I turn my AC off if it's not cooling?

So, if your air conditioner isn't cooling, and you suspect a refrigerant leak, or if you've checked the air filter and thermostat to no avail, yes, you should shut your air conditioner off and call us right away.

How do you clean window air conditioner coils?

1:533:18How to clean your window AC unit - YouTubeYouTubeStart of suggested clipEnd of suggested clipEasily. If you do notice any bent fence carefully move them back into. Place then spray the can ofMoreEasily. If you do notice any bent fence carefully move them back into. Place then spray the can of condensed. Air inside your unit to dust off the coils. This part should be done carefully.

Where is the fuse in a window air conditioner?

The fuse, particularly common in newer models, helps protect the electronic control. Check to ensure that the power supply to your unit is good, then unplug the air conditioner and remove the cabinet cover. The fuse will be located near the circuit board; check to see if it has blown, using a multi-meter if necessary.

How long do window air conditioners last?

about eight to 10 yearsA great window air conditioner can keep a room cool and comfortable throughout the day, even during a summer scorcher. It can also last a long time before it has to be replaced. Generally, window air conditioners last about eight to 10 years.

How do I know if my window air conditioner is low on Freon?

However, if you think your AC may be low on refrigerant, look for these 4 signs:Your energy bills have increased.You notice warm air coming from your vents.There's ice or frost forming on your AC.Your AC is making a hissing or bubbling noise.

Does my AC have a fuse?

Test the load: If you saw a voltage reading during the previous step, run the same test on the “load” side of the fuses. You should again see a reading between 220 and 240. If you see a voltage reading on the “line” side but not the “load” side, it means you have a blown fuse.

Air Conditioner Doesn’T Cool

A window or room air conditioner that doesn’t cool may need to be recharged with refrigerant, but the chances are good it simply needs to be cleane...

Air Conditioner Doesn’T Turn on

Window and room air conditioners draw a lot of electrical power, which can lead to less than peak performance or even complete failure. If your roo...

Air Conditioner Makes Noise

If an air conditioner is making too much noise—the problem may be that it has bad bearings, something that is best handled by an an appliance repai...

Air Conditioner Troubleshooting Video

The very comprehensive video below does a great job of showing you how to troubleshoot a window air conditioner for various problems. It begins wit...

What to do before troubleshooting an air conditioner?

Before you begin troubleshooting, it’s helpful to familiarize yourself with the individual components of your air conditioner. This will help you see what role each one plays in keeping your space cool, and help you determine which one is malfunctioning.

Why does my air conditioner keep turning on and off?

This is also called short cycling. An air conditioner that repeatedly turns on and off can be caused by: a dirty, obstructed, and/or improperly placed thermostat. an over- or under-sized air conditioner. a dirty air filter. a dirty evaporator or condenser. a refrigerant leak.

What is the role of thermostat in air conditioning?

Thermostat: Responsible for sensing the room's temperature to regulate the air conditioner's on/off cycle. The thermostat is often a small copper tube about three or four inches long, and usually clipped onto the front of the evaporator.

What is the face panel on an air conditioner?

The face panel is the first thing that needs to be removed to access the rest of the air conditioner's parts. Depending on the unit, the face panel may be held in place by screws, tabs and clips, or both.

Where is the condenser located?

Condenser: Located on the very back of the unit , the condenser has the same components as the evaporator (copper tubing, fins, and refrigerant), but it captures the room's hot air and release it outdoors with a fan (the condenser fan). Refrigerant: A liquid (in the condenser) or gaseous (in the evaporator) compound that circulates through ...

Where is the filter located on an air conditioner?

The filter will either be located inside or directly behind the face panel.

How to tell if refrigerant is low?

Check the Refrigerant Lines. Inspect your refrigerant lines for evidence of low or leaking fluid. Symptoms of low refrigerant can include ice formation on the evaporator coils and hot air being emitted from the unit. Bubble formation or hissing and gurgling noises can indicate a leak in the refrigerant lines.

What is window air conditioner?

Window air conditioners are a fast and affordable way to cool certain rooms in your home. Ideal for renters or people living in mild climates, a window air conditioner uses a minimal amount of energy to maintain optimum comfort levels in your home.

What happens if my window air conditioner blows fuses?

If your unit blows fuses or pops the circuit breaker when it turns on, you’re probably running it on an inadequately sized circuit. The typical unit can run off a 15 amp circuit, but larger window air conditioners need a dedicated circuit.

How long does an AC unit last?

Your appliance’s age also plays an important role in your decision to either repair or replace the unit. Most AC units have a lifespan of about10 years. If you’re diligent about your annual maintenance, filter changes and safe storage of the unit when it’s not in use, you might add a few years to the lifespan.

What can a contractor do to help you?

If you’re experiencing other less common problems with your unit, your contractor can help you diagnose and solve those, as well. Unit Cycling On and Off Frequently.

How does a compressor work?

In the compressor, the hot gas is pressurized until it reaches the chilled liquid state. The liquid refrigerant then passes into the evaporator coil. The system’s fan pulls warm air through the filter and into the unit. Here, the air passes over the cold evaporator coil and becomes chilled.

Do window air conditioners use refrigerant?

All air conditioners use refrigerant to cool air, so if you’re familiar with how standard HVAC units operate, then you have a basic understanding of window air conditioners. Window units are simply smaller. In the compressor, the hot gas is pressurized until it reaches the chilled liquid state.

Why is it cheaper to replace a window unit?

If the device is relatively new; it is typically less expensive to replace the unit because manufacturers do not build them to undergo lengthy maintenance.

What is the face panel on an air conditioner?

Face panel: This is the plastic or metal cover that is mounted to the front of your air conditioner. It is also called a grille cover. The front panel is the first element that must be removed in order to get closer to the remainder of the air conditioner’s components. The front panel is often secured in place by bolts, clips, and tabs, or both, depending on the device.

When To Hire a Professional Contractor?

It is critical to consult a professional if you are experiencing any serious problems with your window air conditioner equipment. Here are a few common difficulties that a professional contractor may help you with. If you’re having other, less odd problems with your system, your local contractor can help you diagnose and resolve these as well.

How long do air conditioning devices last?

Devices are expected to last eight to ten years, but you must first try to solve the issue before replacing it. (If you really need to get rid of anything, check out our guide on getting rid of nearly anything.) To begin, inspect the device’s seal to ensure that heated outside air does not escape inside.

Can you cover an air conditioner in the winter?

Room air conditioners should be secured from the weather throughout the winter. Consider removing the device from its mounting and storing it, or cover the outside of the unit with a professional room air conditioner cover or thick plastic sheeting secured with duct tape.

Where is the filter on an air conditioner?

Filter: It will be located either within or just behind the front panel. It is a thin, pleated filter that protects individual components of the air conditioner from dust and dirt and cleans the air before it is going back into the room.

Do window air conditioners work?

Room or window air conditioners work in the same manner central air conditioners do. They are more likely to cool rooms than the entire home. Even though they are smaller, they are often more costly than central systems.

Why won't my window air conditioner turn on?

A window air conditioner won’t turn on if the fuse of the main power source to the unit has blown. If that is the case, fix it by replacing the fuse wire.

Why is my window air machine not working?

You can fix the problem by cleaning or replacing the filter. At times, the filter can even get stuck from accumulated debris, and if this happens, the window air machine can’t operate as the evaporator coil freezes. That is why checking the thermostat is such an important troubleshooting step.

What happens if an air conditioner fuse burns out?

If the air conditioner draws power from a circuit shared by other appliances, it can’t draw required power supply and will blow the fuse repeatedly. By providing its own high-voltage plug, it can run smoothly with fewer interruptions.

How to fix a thermostat that won't turn on?

Check the temperature of the thermostat on your unit. If it the unit is set to "heat," it won't turn on. If it is set properly, try lowering the thermostat slightly to see if it makes a difference. Sometimes the thermostat gets stuck, but you don't know because it appears to be set properly. This is why it is important to make adjustments as you troubleshoot.

What to do if power cord is cut?

If the power cord is cut, safely unplug the unit and take the appropriate measures to fix the broken areas.

What are the problems with air conditioners?

The Most Basic Problems of Air Conditioners. With residential air conditioners, there are a lot of moving parts. There are electrical and mechanical components, refrigerants, and a lot of copper tubing. Something can go wrong at any time.

How To Repair Portable ACs?

The biggest difference between a window unit and a portable air conditioner is that the unit is actually in your room instead of sitting on the window sill. The unit itself uses the same technology, containing smaller components inside a compact shell.

How To Repair Car’s/RVs ACs?

An automotive air conditioner also generally requires a trained, certified (EPA 609) technician. The biggest difference is that you can go to them, saving you money and time. However, before you drive to a mechanic, there are a couple of things you can check yourself.

Why does my air conditioner fail?

The other most common issues with automotive air conditioner failure are due to leaks in the refrigerant lines, bad seals, or a worn compressor clutch. All of these issues require a trained and licensed professional to diagnose, locate (for leaks), and repair.

Why does my Lennox air conditioner lose airflow?

After installing a Lennox air conditioner, the biggest consumer complaint is that the system loses airflow. However, this generally goes beyond a dirty or clogged air filter (though you should always check this first). The largest reason this occurs is that the system is improperly installed.

What does it mean when your AC is broken?

Your AC is considered broken when it no longer produces cold or hot air into the home. Even if the system comes on, if the airflow isn’t high enough, the temperature isn’t right, or the system doesn’t move air at all, it is broken.

Where is the cabin air filter located?

Almost every car made after 2001 comes with a cabin air filter (many older models do, too). This filter is located under the dash or behind the glove box that filters the air from the AC system. When this filter becomes clogged, it can prevent the cold air from accessing the vents.

How to fix an unresponsive window AC unit?

Don’t let an unresponsive window AC unit scare you. Often this window air conditioner problem can be fixed by just plugging back in an unplugged cord from the outlet.

How much does it cost to set up a window air conditioner?

That way there’s no chance of the circuit overloading and tripping the breaker or blowing a fuse. A licensed electrician can set this up for you for around $100.

What is the condenser fan?

The condenser fan that blows hot air from the hot condenser coil out into the outside. These are the elements of your air conditioning unit that will most likely need a little bit of extra attention over time, and these are the components of your device that you’re going to spend the majority of your maintenance on.

Why is my air conditioner not blowing out cold air?

The most common causes of your air conditioner not providing cool air are a dirty air filter and a damaged condenser coil.

What controls the temperature of the air and the room it’s working in?

The thermostat which controls the temperature of the air and the room it’s working in. The compressor that moves the flow of air as well as the coolant material throughout the AC unit. The condenser coil that converts hot air into cool air. The condenser fan that blows hot air from the hot condenser coil out into the outside.

What causes condensation on AC unit?

The evaporator coil is what causes moisture condensation to form and this is supposed to drain onto a metal pan at the bottom of your AC unit, which then flows outside through a hole or drain tube. If water is dripping out the front panel, then the pan is not sloping correctly toward the back of the unit. To correct the problem, ensure that your ...

Why is my window air conditioning constantly cycling on and off?

A window air conditioning unit that is constantly cycling on or off can usually be traced back to a thermostat or temperature sensor that is on the fritz and no longer working the way that it should.

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