Remove Dust: Mold feeds on dirt and dust. Keep your air conditioner on at all times to prevent the growth of mold. Mold related illness can seem as if the person has a common cold or the beginning of the flu. If you are uncertain, call All Hours Air and we will send a technician out to do a thorough inspection. ©2020 RW Warner, Inc. | All rights reserved, How To Prevent Window A/C Units From Molding. How to Prevent Mold in an A/C Drip Pan. How To Remove Mold From Air Conditioner Ducts. The Capacitor is the device that keeps an extra charge to kick-start the motor. mold in window air conditioner. The final cause of mold in the ac unit is from not running it regularly. To fix this problem, Warner Service is offering some expert prevention tips: Buy a unit with humidity control. For hard-to-remove buildup, use a stiff toothbrush dipped in bleach. It stays in the window all year. Removing air conditioner mold from a window unit involves practical care to ensure your safety. In a bucket, mix ½ cup bleach, 1 tablespoon mild dish soap, and 3 gallons hot water. It depends on what you use. You should also wear gloves and wash anything that the spores come into contact with. Mold growing in an AC unit or in your home’s HVAC system is a serious problem, because it allows mold spores to be spread throughout the house. Privacy Policy, All Hours Air 395 Freeport Blvd. This happens when the windows leak rain in from the outside, or when moisture condenses on the windows in a bathroom after a shower. This leaves your home without airflow, causing moisture to build up without circulation and temperatures to rise without an active cooling system. Scrub the moldy areas of your air conditioner well, and clean the air conditioner front grille if it’s moldy. Humidity that window units draw in from outside air doesn’t just disappear; it settles in and around the coils that keep the air cold. Purifying the Air in Your Home Use mold remover to kill visible spots of mold. If you need help with dust prevention, check out Warner Service’s, 15 Solutions To Controlling Dust In Your Home. They’ll conduct a deep inspection similar to Warner Service’s and teach you how to properly maintain and care for them. In addition to water and air, mold needs organic matter to breed. Once you’ve taken care of the mold in air ducts, it’s important to make sure it doesn’t happen again. Once this happens it doesn’t take long for the mold to begin spreading and growing all over the home. 4). Rinse the window only if you think your kids or pets might come in contact with the glass and get the cleaning solution into their mouths. There is also a ceiling ac duct in the ceiling about6 feet in front of the dresser. Try to keep your humidity beneath 55% during the winter months. Using a vacuum extension and hose, clean the inside, bottom, back of the cover, sides, and metal grill if the unit has one. Mold in window air conditioning units is also a problem, since window units blow mold spores out into the room. Removing black mold can be a challenge, and is very time-consuming. Especially since the newer ones have no condensate drain for the reason that Ted527 stated. One is to place a cover over the outdoor air conditioner. The long answer is a bit more complicated. Why do window air conditioners get mold? This will continuously cycle the air in your home while you’re away for a long period of time. ... have a comfort air 10,000 btu unit. Rake around the air-conditioning unit and remove all leaves and debris within at least 2 feet from the unit’s base. If it has a disposable filter, manufacturers recommend changing it monthly to help keep mold at bay. Remove the air filter on the front body grille. By not removing, cleaning, or covering it during the winter season, you are creating the perfect scenario for mold to continue to erode inside. This option allows the air conditioning unit to control the level of humidity in the air, automatically discouraging the growth of mold. Condensation from the air conditioner is meant a drip out of the air conditioner through the back. For the next important step, you will need either the owners manual or the number to call the manufacturer. Mold grows and spreads fast and easy and before you are aware of its presence, you can have mold spreading and growing throughout the area. Mold doesn’t like humidity below about 60%. In time, this condensation creates an environment conducive to mold growth. If you have mold in a window air conditioner unit, follow the link for more information. Mold and mildew in the AC unit is one of them. My customers are often shocked to see it and want it removed. Soak for 15 minutes and use a scrub brush to clean. Same reason cold beverages sweat and create condensation is that same reason hvac systems create mold. Be sure to store your window air conditioner in a dry area during the winter season to prevent dust and debris from coating the inside of the unit. Many window A/C units come with a humidity control option. Warm, moist, and stale air is the perfect environment for mold to grow. When you leave for family vacation, don’t turn your unit off. AC systems can get a buildup of mold fairly easily if they aren’t cleaned and inspected properly or if the air filter is dirty. Air conditioning mold needs to be removed as soon as possible, to protect your health and the health of your loved ones. If your window air conditioner starts to have a musty smell, there may be mould growth inside. Warm, moist, and stale air is the perfect environment for mold to grow. The way that you remove the mold depends largely on the type of air conditioning unit you have. If you need help with dust prevention, check out Warner Service’s 16 Ways To Clean Dust In Your Home, How To Get Rid Of Dust, and 15 Solutions To Controlling Dust In Your Home. Ensuring that your attic has fans will minimize mold growth in your attic. 8). Mold on window sills can develop in and around window frames. A wet, humid environment encourages mold to grow and to spread. If the above symptoms started since using your AC, there is a good chance your illness could be due to mold in it. Mold appears as the result of a damp environment. Use a vacuum attachments to clean out debris from the unit’s interior. When it's not in use, you should store your window unit indoors. We recommend doing so if you’ve found mold in window air conditioner units so that you can make sure there is no mold in the walls adjacent to those windows. Harsh chemicals in fungicides can harm its delicate evaporator and condenser coils. A dark area with standing contaminated water are the perfect recipe for mold production. An air conditioner. When mold grows within the central heating, cooling, and ventilation system, there are high chances that every room connected to the vents receives generous amounts of mold spores. If the filter to your unit is reusable, remove it and clean it with hot, soapy water until it is nice and clean. Then, wet a wash cloth and clean the moldy areas. ( Here’s how to find a good AC installer in Atlanta ) And if your ducts already have mold in them, The Environmental Protection Agency (EPA) recommends getting them cleaned—after you’ve fixed the source of moisture. To remove all the dust and particle buildup, use a soft brush and gently remove everything. Use a cloth, brush, or sponge to soak up the solution. Keep it clean: Dirty air conditioner units and air ducts can potential disrupt the air you breath and cause poor indoor air quality. As an HVAC service tech and owner, I open indoor air handlers often for repairs and maintenance. Keep unit running while on vacation. Our experts will ensure your AC unit is mildew free and smells as fresh as ever! Sprinkle a thin layer of powdered laundry detergent on the filter and cover it with hot water. Use a simple hydrometer to measure your indoor humidity to keep tabs. Preventing this requires basic HVAC maintenance, including checking it regularly and carefully cleaning any sign of water or formed mold. Cleaning up an HVAC mold problem is a difficult and possibly expensive task. Window Air Conditioner. Small spores of mold are often hard to see right away, however, given time, the mold will grow and become more apparent to the human eye. For a split system have the evaporator at the very least checked if it hasn't been cleaned lately. I was due to clean my window ac units filter ad coils and decided to record it for educational purposes. Expect some debris and soot to discharge from the vents once it is back on. This article deals with mold in central AC systems. 2).Check the owners manual to see how to discharge the Capacitor correctly. It can help prevent the causes of mold by making sure there are no issues that can cause moisture leaks. On most units, this can be done easily by pulling it forward … This moisture added with dirt and dust from the air creates a perfect environment for spores of mold that quickly grow and spread. Schedule a Free Inspection For Mold. Scrub the mold off of the windowsill using a non-abrasive brush and frequently dip the brush in the bleach mixture. 17.99% fixed APR, effective as of July 1, 2020, subject to change. This causes condensation, which mold loves. The condenser section, depending on various factors, should be cleaned periodically. Unscrew the metal cover behind the front body grille, and lift it directly upward. Apply the solution to the glass using a spray bottle, sponge, or cloth. 1).First, disconnect the window units power source, including if it is wired directly to the home. Even though condensation runs from it to the outdoors, the build-up forms in and around the ducts and coils as the cold air makes its way through the system, creating the perfect breeding ground for mold that thrives with moisture. it is wall mounted. Mold and mildew, which tend to appear suddenly and spread rapidly, are among the most pesky household irritants. Mold on window sills can develop in and around window frames. To maintain proper airflow in your home, it is important to keep ceiling vents open at all times. A more thorough cleaning is also required but is best left to a professional technician. Leave on the Air Conditioning to Avoid Mold Leaving the air conditioning running in your home will not only cool your home, it will help remove moisture from the air and help circulate and filter the air. Take off the front body grille of your unit. Setting your AC on a very low temperature can sometimes lead to mold around the vents.When the cool air from the vents meets the warm air in the room, the temperature difference can cause moisture in the air to condense on surfaces in and around the vents. Removing black mold can be a challenge, and is very time-consuming. If mold is already present, turn the A/C unit off and prepare a bleach solution made of 1 cup of bleach to 3 cups of water. A more thorough cleaning is also required but is best left to, how to properly maintain and care for them, Dust helps mold grow on your unit. Extensive mold removal and repair cost can accumulate just as fast if the mold isn’t detected early. Using a vacuum extension and hose, clean the inside, bottom, back of the cover, sides, and metal grill if the unit has one. As the air blows through the filter, microscopic spores can spread throughout your home and can even make you sick. If the discovery of mold is early enough and prompt action is applied, the homeowner can get a handle on the danger before it progresses too far. Prevent Re-Growth of Mold in Your Heating and Air Conditioning System. In these cases, good cold air is not necessarily good healthy air. Plug it back in, and fire it up. Allow the … Keep the Moisture under Control The last thing you can do to avoid the appearance of mold is to purchase an air conditioner with humidity control. Use a good light source and look carefully for any visible mold. This led us to clean all our window AC units.We even found a little mold on the unit that generally sits in a North facing window. Cleaning up an HVAC mold problem is a difficult and possibly expensive task. The best thing you can do to prevent the appearance of mold is to buy an air... 2. If mold has developed around a window in your living room, bedroom, or basement, find out how water is getting into the frame. Wipe any visible mold growth. Plumbing Leaks: Examine pipes for leaks and insulate if needed. Wall Leaks: Weather strip and caulk leaky windows. Unusual odors coming from window air conditioner units often result from mold growing on damp surfaces. All Rights Reserved. To reduce humidity, use an air conditioner or a dehumidifier and empty the collected moisture frequently. Remove the filter and inspect it carefully, as well. Also, maintain your home at around 80 degrees when you’re on vacation or at work. ... dust ruffle on the opposite side of her bed from window ac unit. If that moisture builds up and never gets a chance to dry out, it can lead to mold growth. Water condenses on the AC coils, and then if dust or dirt happens to be on the coils, mold will grow. Use a dehumidifier to reduce humidity levels in our house. Blowing out or vacuuming out the fan, coil and grill will improve air flow which will result in better running units. Cover it with a plastic sheet or tarp to keep dust and debris from accumulating. Use a clean rag to then wipe away the mold you loosened. At the very least, you should be wearing an N-95 respirator mask when getting rid of mold. More times than not, I find mold. Mold can crop up if it’s too humid as well – a problem we all suffer through here in Jacksonville. possibly black mold. You can do it yourself or hire a professional cleaning service to remove mold from the unit. This led us to clean all our window AC units.We even found a little mold on the unit that generally sits in a North facing window. Ways to Prevent Condensate Drain Clogs • Regular Flushing Routine maintenance is an effective way to keep the line clean. If it’s reusable … To keep window A/C units clean, run it constantly and perform (or schedule) regular maintenance like dusting and clearing water. Did you know that the first air conditioner was made to dry ink and keep paper straight in a printing press room? Mold in a home can lead to serious health issues and it doesn’t take long for the symptoms to begin. Never Stop the Air Conditioner Interest starts accruing when the loan closes. If there is a great build … Every time it is turned on, small invisible spores of mold constantly fill the air. Air Conditioner Maintenance Tips: Follow these maintenance tips to prevent air conditioner mold in your South Jersey home or business. Attic fans can be electrical … This happens when the windows leak rain in from the outside, or when moisture condenses on the windows in a bathroom after a shower. HVAC maintenance is so important, especially during the shift in seasons. Use caution while handling the metal pieces, the edges can be sharp. This option allows the air conditioning unit to control the level of humidity in the air, automatically discouraging the growth of mold. Air conditioners use condensation lines to drip water away from the unit to the … 5). Besides cleaning out the units to check for mold, a good clean-out will improve the efficiency of the air conditioning unit. Repayment terms vary from 30 to 138 months. Besides cleaning out the units to check for mold, a good clean-out will improve the efficiency of the air conditioning unit. If you suspect … after a bit it spits out wet black, wet ick. Remove the air filter. You can see mold growth on the unit or the air filter. When you open windows and doors, you let air conditioning escape, waste money, and invite humid air into your cooler home. Coatings of dust and dirt provide a perfect medium for the fungi that cause unpleasant smells. Mold spores in the air … Also read: How to Eliminate Mold from Air Conditioner Duct. Remove it from the window and keep it in your attic or basement. This can be done by setting your air conditioning thermostat above 70 degrees. My problems started when the mold inspector reported elevated spores were four to five times the amount found outside. Be sure to use a good dirt and grim cleaner so that when you open the cover no loose particles fall inside. White Mechanical, Inc. This feature means that the unit can turn on and off by itself. Generally, your window air conditioner should complete this task with no major issues. Set the filter in an area where it can dry thoroughly before you put in back the A/C. To further prevent mold growth on your windows, it is essential to regularly clean your home’s interior. Is Your Air Conditioning Unit Blowing Hot Air or Not Working Properly? It is imperative that you not wait if symptoms like those listed above begin surfacing in people of your household. Failing to install filters and keeping it clean allows dust and outside debris to pass through it, mixing with the humidity- creating the perfect storm for mold, allergy, and asthma symptoms. Chances are you will be able to see mold in your AC if you make a thorough inspection or if you remove the filter and examine it, there could also be visible traces there. Mold production and growth in A/C is a much more serious problem than what homeowners are aware. Sparks Nevada 89431, Copyright 2020, Home & Local Services LLC, installation or replacement of Air Conditioning, Selecting the Best Air Conditioner Unit For Your Reno Home, Jobs/Careers at All Hours Air in Sparks, NV. Take off the plastic front grille and inspect the styrofoam ducts for specks and spots of black mold, which can cause breathing problems and sickness. In an air conditioning and heating system moisture occurs due to the mixing of hot and cold temperatures. With window unit AC's, I remove them and clean them annually. These can be relatively inexpensive to purchase, depending on the size of your unit. Gently scrub the glass to remove the mold. If you are looking for AC cleaning services in Orange County, contact us today. They have standing water inside the housing. If you or other members of your household began experiencing any of the following symptoms, you see your physician as soon as possible. Every time it is turned on, small invisible spores of mold constantly fill the air. Not many people are aware that the vents inside the units are a breeding ground for black mold and mildew. Another thing that you can do to prevent mold from growing on your window air conditioning unit is to get one that has an auto feature. Dispose of and replace the filter, or wash it with laundry detergent and hot water. You can visually inspect your window air conditioner for signs of mold. The short answer to whether or not you can spray your air conditioner to kill mold is: Yes. What You Get From All Hours Air: • We'll Come to Your House• Diagnose the Problem with Your AC Unit• Provide a Comprehensive Report on the Problem• Present You with Personalized Solutions on What to Do Next• All Hours Air ensures 100% Customer Satisfaction on all Repairs & Installs, Call for Conditions & Restrictions/Present Coupon at Time of Service/Not Available to Combine with Other Offers, NV HVAC License #0077009NV Plumbing License #0084895, Copyright © 2020 All Hours Air. Putting a damp filter back in will only attract more dirt and mold. 6). Even if it is too soon to see active mold on or around the filter, yet the smell it there, do a detailed inspection of the coils and around the motor for any signs of onset growth activity. Because window A/C units are dark and warm on the inside, it's a great mold breeding ground. Keep your air conditioning ducts free of dirt and other debris. If you continue to smell this odor, rest assured there is mold somewhere in your home. It allows your heating and cooling system to prepare for the change in weather before it’s too late. Remove the cover from the front of it by either unsnapping it with your hands or removing the screws/plastic hooks that hold the cover in place. This step in necessary because it will make sure there are no electrical charges left on it before you start the cleaning process. How to Keep Mold and Mildew Off Windows and Mini-Blinds. Mold growing in an AC unit or in your home’s HVAC system is a serious problem, because it allows mold spores to be spread throughout the house. How To Remove Mold From Air Conditioner Ducts. Preventing this requires basic HVAC maintenance, including checking it regularly and carefully cleaning any sign of water or formed mold. Most homeowners expect to discover mold in basements, leaky areas around roofs, and under carpets that are old or that have gotten wet at one time. If your AC has humidity control features, use it to regulate the humidity in the air to avoid the accumulation of moisture in the AC vents. To eradicate this problem, thoroughly clean your window air conditioner. Cleaning mold out of a window AC unit. This leaves your home without airflow, causing moisture to build up without circulation and temperatures to rise without an active cooling system. In this way, the air conditioner will regulate the moisture level in … Instead, use the “auto” function on your air conditioning unit. Reassemble the air conditioning unit, and plug it back in. Remove Filter. The best way to deal with mold in an air conditioner … Mold will grow where there is moisture, such as around leaks in roofs, windows, or … Get rid of the moisture and you’ll keep the mold from growing. At least initially, mold blown from a window air conditioning unit affects only the room in which the window unit is installed. Interest waived if repaid in 18 months. An extra window air conditioner installation kit and window AC accessories can add extra support to your model. With black mold growing in your air ducts, you may notice symptoms like itchy eyes and sneezing growing worse when you’re indoors, particularly when you’re running the AC. That is why Cleaning Your Window AC Unit, Avoid Mold and Mildew are important. Spray it lightly with the mold-killing spray before you start working to prevent … 3).Next, clean the outside cover by wiping it down with a wet cloth. Mold tends to build up when the air conditioner is not running and the air is still. Question: In the process of selling my home, the buyers requested a home inspection. Turn on the air conditioner. Gather the right protective gear. Indoor window air conditioners are famous for more than just cooling an area. If there is a great build-up, a wet cloth is good to use to remove excess grime. Make a mixture of one part bleach to three parts warm water. If your window A/C unit has mold on it, that means you're at risk for health problems and a costly replacement. Put on a face mask, eyewear, and protective gloves. That is why Cleaning Your Window AC Unit, Avoid Mold and Mildew are important. Keep the Moisture Under Control Humidity is one of the main factors that go into the growth of mold. Air conditioners not only cool down the air but also condition it by removing moisture. After paying a contractor to clean and treat for molds, the follow-up test showed the levels were even higher. HVAC maintenance is so important, especially during the shift in seasons. Air conditioners can be a source of condensation. 7). Mold production and growth in A/C is a much more serious problem than what homeowners are aware. While it is important that you leave major air conditioning cleaning and upkeep to the professionals at All Hours Air, there are a few tips for you to use for keeping your A/C clean. Depending on the situation and where the mold tends to grow, keep in mind the following principles of mold prevention in your heating and air conditioning system: Change the air filter regularly, typically every 2-3 months. (This is from, chemicals called microbial volatile organic compounds.). Dust helps mold grow on your unit. Use “auto” mode. May it be time to step up to a new central cooling unit? How to Keep Algae From Growing in an Air Conditioner Condensation Line. This will prevent mold growth. Don’t give mold any food to live on! If the drain line gets clogged, the overflow pan may not be able to contain all of the condensation and there will be leakage. You should know, though, that mold may be present even if you don't see it. 5 Tips for Preventing Window Air Conditioner Mold 1. This is how the water that condenses in an air conditioner is taken away from the unit. Cleaning mold with bleach solution. Blowing out or vacuuming out the fan, coil and grill will improve air flow which will result in better running units. If this is the case, disconnect or turn off the main breaker in the circuit box. So keep doors and windows shut when the AC is humming. hbspt.cta._relativeUrls=true;hbspt.cta.load(400849, 'b53ee142-beab-4a8f-967b-c1f3e99aabb7', {}); Perform (or schedule) regular maintenance. Window Condensation: Install insulated glass or storm windows to prevent condensation problems. Use a cloth, brush, or sponge to soak up the solution. However, if your air conditioner has built up mold from the moisture that collects inside, you're spreading harmful mold spores every time you turn it on. HVAC Keeping your air conditioner unit clean will help prevent future-extensive, and possible very expensive repairs from occurring as well as maintaining the reliability and efficiency of your A/C for several years. Mold grows in wet environments, as fungus requires water in order to become active. Appliances Standing water means contaminated water. Ever wonder why your air conditioner is called an air conditioner, instead of an air cooler? For more information about. Call All Hours Air for a more detailed cleaning and servicing of your unit to avoid potential damage that could cost you more money and prevent sickness in the future. In North Florida I find mold tends to grow inside these air conditioner areas. Mold in the air outside can be brought indoors on clothing, shoes, bags, and even pets. We offer installation or replacement of Air Conditioning units for Reno and Sparks residents. If you get a new air conditioner, make sure it’s properly sized and installed. 7). Mold can get in your home through open doors, windows, vents, and heating and air conditioning systems. Window air conditioners make a welcome addition to any room in need of cool air during hot-weather months, but if gaps or holes develop around the unit… Leakages within the ac unit are another cause, which is usually the result of an incorrectly installed system or due to a lack of maintenance. Most air conditioner units feature an “auto” mode, which is the best mode for it when... 3. Turn off your air conditioning unit immediately. Let it … For more information about HVAC maintenance, download Warner Service’s checklist today: hbspt.cta._relativeUrls=true;hbspt.cta.load(400849, '9f8fa84e-2c1d-4703-9372-ee327e2f1de7', {}); *Loans provided by EnerBank USA, Member FDIC, (1245 Brickyard Rd., Suite 600, Salt Lake City, UT 84106) on approved credit, for a limited time. It allows your heating and cooling system to prepare for the change in weather before it’s too late. The first sign of mold the homeowner typically recognizes is a musty smell that fills the room often without the visual detection that there are active mold spores present. Install a window AC unit and keep the temperature a little cooler to create ventilation and prevent growth. A window unit isn't connected to your home's heating and ventilation ducts, though. Store your air conditioner inside during cooler weather. Simply put, it doesn’t just cool your air, but it conditions your air by removing moisture. Many window A/C units come with a humidity control option. If it has a disposable filter, manufacturers recommend changing it monthly to help keep mold at bay. First, it's difficult to clean those window units adequately and in fact, it's usually cheaper to just buy a new air conditioner. An Air Conditioner Cover Now that the interior of the unit has been cleaned out, you can place an air-conditioner cover over the entire unit and keep it there during the off-season. The HVAC component was designed to wick away moisture, and in turn, prevent mold growth. Because window A/C units are dark and warm on the inside, it's a great mold breeding ground. Do-It-Yourself. Let the unit, air filter, grille, and metal cover dry completely. If mold has developed around a window in your living room, bedroom, or basement, find out how water is getting into the frame. The best way to deal with mold in an air conditioner is to control moisture and prevent it from happening at all. When you leave for family vacation, don’t turn your unit off. Generally, the process involves taking apart your AC system to vacuum and clean the system using powerful agents. If it’s a disposable filter, all you need to do is replace it with a new one. If you vacuum away dust, dirt, pollen, dust, and other … Potential problem areas to address to keep mold at bay include: Roof Leaks: Check attic for roof leaks, and repair any that are found. Allow it to dry completely before reassembling it back together. Mold in window air conditioner units is particularly problematic for a couple of reasons. Illnesses Related to AC Mold After dragging our window AC out of storage, I noticed that it was full of mold. as time goes on i notice the inside turns black. Allow the solution to sit for approximately ten minutes, then rinse with water and a damp cloth. Turn off your air conditioner to prevent further mold spores from entering your home. symptoms of mold-related illnesses, including shortness of breath, wheezing, coughing, sneezing, snoring (if you don’t normally snore), rashes, itchy skin, asthma attacks, irritated eyes, sore throat, headaches, respiratory infections, and fatigue. My bedroom window air conditioner, a Frigidaire 7 years old, seems to have developed mold, and I’m about to replace it. The moist and dark areas inside an AC unit are a prime location for mold to accumulate. Clean your air ventilation systems regularly, and check filters and intake systems in your HVAC system for any mold growth. Scrub the moldy areas of your air conditioner well, and clean the air conditioner front grille if it’s moldy. The water which accumulates attracts more dust than usual, and both the water and dust fuel mold growth within the air conditioner. Get rid of dust. Clean or replace your air conditioner’s filter regularly, and vacuum the interior to clear out any dust and debris. 1. If these get absorbed, they may spread mold spores in the vent leading to mold growth in the AC unit. That’s right, you can schedule a free inspection for mold if you’re concerned about mold in your home. Getting an HVAC preventative maintenance plan is a great way to keep an eye on the mold and keep your HVAC system healthy. To keep window A/C units clean, run it constantly and perform (or schedule) regular maintenance like dusting and clearing water. Instead of buying a new one, I decided to see if I can clean it. 1. Mold typically will grow when an outside unit or window unit has its cover left off or during the winter months when it isn’t in use. Leaving a little … Professional cleaning can help in resolving the root cause of the problem and keep the musty smell away. Here’s how to clean a window air conditioner for mold. Mold spores could also cause allergic reactions and asthma. Bleach kills fungus and will prevent mold buildup in the air-conditioning system. As soon as you switch your heater or air conditioner on, the microscopic particles start floating and blowing out with air into the room. However, if the smell is stronger when you turn the unit on, chances are there is mold growing in it somewhere, even if you are unable to find where at the time. In a bucket, mix ½ cup bleach, 1 tablespoon mild dish soap, and 3 gallons hot water. Think Condensation. Maintenance Air Conditioning You can smell something musty when you turn on the air conditioner. But, not many are aware of the danger that lurks inside their air conditioner. Here are 3 of the most common places we find mold in an AC and heating system and what you can do to prevent mold growth there.