If your unit is too big, it cycles too quickly and doesn’t run long enough to dehumidify the air. Must, Mildew, and Mold; If there is excess humidity or moisture in the HVAC system, you could end up with mold and mildew flowing through the ductwork. Try it, I am most sure it will work after a couple times. I am sorry this has happened. M son decided to start using the air vent in his room as a urinal. They can be unpleasant, annoying, or barely noticeable. If you apply the OUT twice & still have odor, then you haven't gotten it on to all of the urine. My car smells like urine when I blast the air, or sometimes I will also get the occasional whiff. A leak or crack in plumbing could lead to a sewage scent if those cracked pipes are close to your A/C ductwork. Be sure you install the filter with the proper side facing outward. A smell like mildew or mold is probably the most common ailment of HVAC systems. Try it again. Another thing that works wonderfully and you can use it after the OUT! Dealing with odors coming from heating vents can be maddening, particularly when the odor smells of rotten eggs or dead animals.You'd like to think your house is not only clean but tightly sealed against invasion from the outside. My car has a manual transmission. Your HVAC system runs most of the time, sometimes cooling, sometimes heating, and always circulating air. Mix 3/4 cup of three percent hydrogen peroxide with 1 tsp. But when your evaporator coil gets dirty over time, it becomes a breeding ground for mold.. If you smell urine coming through your vents, you likely have a pest infestation of some kind. Along with cooling, one of the functions of an air conditioner is to remove excess moisture. Mice in particular urinate and defecate frequently. The Homeowner’s Guide To The 7 Causes of Bad AC Smells. The reason that the smell seems to be coming from the HVAC system is usually that the odor is being drawn in through the intake vent, then dispersed through the home, although it is possible that the electrical issue is occurring inside the heater or air conditioner itself. I thought it was water in the bottom of the unit not getting out, so I drilled a small hole in the back so the water will drain, and sprayed Lysol inside of it, washed the filtter and it still smells. Finding Roof Repair Assistance for Seniors. There is a broken fan in your furnace. The problem might be an air conditioner that is too large for your home size. However, if the air coming from your AC vent is smelly, you might have a serious problem on your hands. While well installed vapor barriers do well to keep moisture out of the crawl space we find many barrier installations that fall way short of optimal installations. A smell like mold or mildew is a common one, but if you’ve been noticing a musty or moldy odor from your vents, it can be difficult to pin down the source. There is an insulation-type material in the duct work that the urine has soaked into. As long as this doesn’t linger too long, you don’t have to worry. You have a gas leak. Air from vents smell like urine with outside air on..goes away with recycle air is on...replaced cabin filter some - Answered by a verified Chevy Mechanic. If the air coming out of your air conditioner vents smells like cigarette smoke even though no one is smoking in the house, it probably means that the previous owners were smokers. I have this problem and just solved it...I took the plastic container the wax cubes come in and duct taped one sqaure onto vent and added scented oil...after 1 min the smell was gone!!! How do I get rid of cat pee in my car vent? Solution: Talk to a HVAC provider to see if your unit is too large and go over your options for a high efficiency replacement. The air filter may be dirty and clogged which restricts air flow and causes the electric resistance heaters to overheat, or it may be a problem with the wiring within the motor. Instead, the problem is probably mold. You may have to do this twice. If you smell urine coming from your air conditioner, it’s probably not because someone relieved themselves where they shouldn’t have. To get rid of this smell, you obviously need to find where the mice are living. Duct tape the air vents or find other ways to cover it up to prevent the air from coming through the vents. Don't use bleach or other cleaners at the same time or they will kill the good bacteria & enzymes. Smells in your ductwork can be caused by a variety of sources such as mold and mildew, animals in your home or ducts, duct leaks, plumbing leaks and issues, building materials, or mechanical issues, such as a leaky (and unsafe) heat exchanger or a bad blower motor that is overheating. Instead, you’re smelling the mycotoxins, or byproducts, it creates. Air Specialist Heating & Air Conditioning is a Houston-area HVAC contractor that has been serving the Houston Metro area with quality service since 1970. In cooler temperatures it may be around the air handler (it’s warm there) and then you need to clear them out. Then I tried baking soda, it didn't seem to work at first but a couple of days latter the smell was gone. Here is useful information on the smells that may be coming from your air conditioning vents. You may have to cover the vents to prevent the smell from lingering around your apartment. After this amount of time smell the area again and repeat with more baking soda and hydrogen peroxide plus detergent mixture if necessary. Read on to see the answers provided by the ThriftyFun community or ask a new question. Cigarette Smoke . The only reason you’d ever smell natural gas coming from your vents is because of a natural gas leak. Not sure about that but I would not recommend touching the engine unless you have someone steam clean it. I've had extremely good luck using "OUT!" We Are Strategically Locatedin Pearland, TX, We Have the Expertise to Service All Your HVAC Equipment, We Are a BBB Accredited South Texas HVAC Business. Since natural gas is extremely flammable, ignoring this bad smell is exceedingly dangerous. You can get a product called Nature's Miracle on Amazon or at your local pet shop. If you smell something that reminds you of fingernail polish remover, you could have a refrigerant leak. It will only temp mask the smells. Mice urinate and defecate frequently in their lairs, and this smell comes out of your vents when the air conditioner or furnace turns on. It's made for removing pet's mess, like cat & dog pee, poo, hairballs, vomit, blood, if this stuff will work for nasty cat urine, then human pee should be a cinch. Air Specialist Heating & Air Conditioning Co., Inc. Running the air conditioner a lot can cause condensation within the unit. One of the most common smells reported by customers is a moldy odor. There are vermin in your air ducts. Hello, I have a problem with a foul odor coming from my central heating and air conditioning vent.It is only one vent that the odor is coming from.It smells like urine or feces,something like that.I do not know exactly how to describe it,the smell is just really bad.Does any one know how to get rid of that odor,or what could be causing the smell?Please help.Thanks so much. Summer also means humidity, and mold is one of the most common reasons why your air vent smells musty. But whatever the smell, it’s usually worth finding out why it’s there. When an odor results from something else, you should have your HVAC inspected by a trusted local company like Air Specialist. stuff works. A lot of people say fungus in the AC system kinda smells like urine and auto mechanics recommend you make sure to shut the ac OFF and let the fan run for a few munites before you shut it down to dry off the evaporator coil. Your air conditioner contains an important component called an evaporator coil, which is the part that actually cools your home’s air.. I would recommend you taking your car to one of the auto parts chain stores (Auto Zone, Advance, NAPA) and let them take a look. Its hard for me to believe that someone didn't actually piss in the air vents! In the meantime, don’t use any electronics or light any candles near the area – sparks and open flames could cause an explosion. The wire brush helps scrape the urine stain off the metal surface and get the detergent solution into the stain. There is a urine like smell that is coming out of the vents when we turn the car on. Spray it down the air vent until half the bottle is empty. They will need to be cleaned or replaced. Q: Why do my air vents have a strange smell? An annual maintenance contract often catches small problems before they become big ones. It cost $4.79 at Walmart for a rather large spray bottle and smells lightly of vanilla. Air Specialist Heating and Air Conditioning Company, Inc. A Message from Air Specialist about COVID-19. When I get home after work, I’ll check it immediately. If I had poured a liquid such as vinegar (which I have always used to neutralize potty accidents when sons where potty training), the heating and air people told me that the liquid would disintegrate my duct work. Most of the time someone in the store will be familiar with this problem and can help you quickly. I know this because one day I began smelling urine. You have to keep it wet for the enzymes to work. Some people think it’s fine to pour vinegar down vents to eliminate odors like urine. Place a new one into the slot where the old filter was and replace the clamps. But, I would also buy the air freshener in the vent after airing it out with the products. My truck A/C has a similar issue - the drain has a bad habit of getting clogged, and when it does, it smells just like somebody took a leak in the vents for the first few minutes after I start the A/C. My car has 150000 miles. This is sometimes a problem in older and/or improperly maintained systems. However, more liquid will just eventually eat away at the entire duct work. Though the most common reason is dust in the duct work, there are several other reasons why you might notice a burning smell when your heat comes on. Allow all these ingredients to sit for two to three hours. We had to not only close off the vent, but tape cardboard over the vent. Why Does The Odor Coming From Your A/C Vent Smell Like Sewage? Dust gathers on the heat exchanger of the furnace when it’s not being used and then burns off when the furnace gets turned on for the first time in a while. But, technically, you’re not noticing the fungus itself. This stuff takes out all kinds of smells. After that you’ll probably need to clean your ducts and install some kind of air filtration system. With the power off you can check your air filters, and if they’re fine and you suspect a problem with the wiring, contact an HVAC professional right away. If the problem is in your carpet (may smell like it is in AC) pour baking soda on carpet and let it sit for an hour or so. I only encountered horrible fumes from the car vent because the filter was old and when we changed it that fixed the problem. Solution: Open the windows every now and again and let the fresh air outside circulate through your house. If your vents smell like something might be overheating, there may be a more serious problem. Then cut, remove; then replace the duct work. Mice in particular nest in and around equipment and ductwork, and where they nest, they urinate and defecate. I love Nature's Miracle and have used it for years. Bigger is not always better because your air conditioner doesn’t just cool the air, it dehumidifies it as well. M son decided to start using the air vent in his room as a urinal. Solution: Find where the mice are living. It even removes blood from clothes. 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