I get a lot of complaints about cold air drafts coming in through ducts connected to the outdoors. Air comes into these rooms through the heating vents to equalize pressure, creating a circulation that warms the rooms. It could be a loud noise, odd odor, or cold air coming through the vents. Properly clean or exchange your air filter for a new one, and see if your furnace begins working again. Check connections. Here’s what to do if you notice cold air coming from your vents: Install insulation. If you have cold air coming out of your vents when it’s set to heating, you may have a bigger issue than low airflow. What blows into his room is not coming to you,” he says. Most pros recommend insulating your ducts up to the floor vents. A dirty air filter is a common reason for overheating because it restricts the airflow. Now the problem is that there is cold air coming out of the vents all the time. It does have a newish looking Goodman gas furnace, yet the gas bills seem outrageous to me ($250 per month when I'm used to $60 in my own house). Be sure to check the filter monthly, and schedule an annual furnace maintenance visit with our skilled technicians. It creates pressure in the closed-off room, which causes the return duct to pull in cold air from any cracks in windows or doors. The switch has two settings: ON and AUTO. So you will feel air blowing through your vents but the air is not heated or cooled by your furnace system. As a result, any air that blows out of the vents while your heater is off will usually feel cold. The furnace sucks air through the return vents, which lowers the air pressure in the rooms in which the vents are located. I know that air comes back down my chimney and flue but can't figure out how it is coming in to the vents. First things first, check your thermostat and look at the fan settings. To troubleshoot a misbehaving gas furnace, start with the easiest explanations and solutions, then work your way to the most complicated. The colder the outside temperature gets the more air we have dropping from the vents. This occurs when the limit switch triggers and shuts down the burners. In addition, the ductwork itself cools down when the furnace isn’t running, especially if it goes through a crawlspace or other unconditioned space. Butterfly dampers. Replaced with newer, high efficiency furnace and cold air constantly coming out of vents (except when furnace running). These filters are MERV (minimum efficiency reporting value)-rated based on how finely they filter the air; the higher the MERV rating (on a scale of 1-16), the finer the filter is and the more it filters out. When the fan in the on position, it will constantly blow air through the home. Natural draft furnaces and central air systems are mostly found in older homes. Forced air system blowing cold air through bedroom vents, hot through the rest. The furnace’s safety switch will automatically turn off the gas, but the blower might continue blowing room-temperature air through your vents. Your furnace will blow cold air if it overheats. Blocked return vent The return vent may be blocked due to dust or other debris. New, high-efficiency furnaces have condensate drain lines. So initially, the air will always feel cool until the air in the ducts is pushed out. Other causes of furnaces blowing cold air. Cold air from your attic or crawlspace gets into your ducts through the holes. The furnace uses an exhaust vent motor that pushes the exhaust gas through the vent pipe, creating a positive static pressure in the vent. A furnace blowing cold air sometimes doesn’t deliver reliable performance. Just like closing doors to prevent air flow, it interferes with your home's energy efficiency. It was pretty chilly. When the unit is running, there is a good flow that keeps the filter from falling out and I don't see any holes in the flex duct. You should always keep them open (yes, even in rooms you don’t use.) But the cold air is coming from somewhere. I have a combination AC/furnace system in my home. A dirty air filter blocks airflow over the furnace’s heat exchanger, causing it to overheat. When air is pulled through the return vent (before being heated or cooled by the system), it first passes through a filter to filter out allergens, dust, dirt, and more. When I was changing the filter, I could feel cold air circulating through the furnace stack, where the slot is for the filter. Your furnace may be blowing cold air because the filter is too dirty. If the switch is set to ‘ON’ this means that your fan is running continuously. Active 7 years ago. Here Fritts Heat & Air details a few common issues for your furnace blowing cold air and when to call a professional for service. The fan keeps running to cool down the furnace, and you’ll feel cool air coming from the vents. Viewed 26k times 1. If you only notice cold air coming from your vents when your furnace first cycles on, there could be an issue with the blower motor. All vents are on the opposite side of the house than the furnace. Maybe your heater is not blowing hot air even though the fan is running. Most often this air will feel cold when the fan is “on” but if you don’t notice a change in your overall home’s temperature most likely this is just blowing out room temperature air. The furnace filter is a critical part of the furnace running correctly and in … Unlike supply vents, return vents do not need to be cased in metal. I just bought my house in September and a new furnace was put in by the previous owner before I moved in. The sound you hear is the reversing valve switching your unit over to cooling mode. So whatever is causing the cold air, appears to be coming from the furnace area. Yes this is more cold air to warm up, but in reality some cold air is going to come into the house through cold air drafts anyway. Natural Draft Systems. The cooler air in the ductwork is then pushed out of the registers by the hot air coming out of the furnace. If you have gone through these basic troubleshooting tips and you are still blowing cold air, you’re ready to make a call to your local HVAC service to have the issue diagnosed and fixed by a professional. When overheating, your furnace can trip a high limit switch, causing the furnace burners to shut off so that the heat exchanger does not crack. The return vent pulls cold air from the bottom of the room and returns it to the furnace to be reheated and returned as warm air. We'v been in the crawl space and didn't see anything loose or torn. Change the Furnace Air Filter. High-Efficiency Vent Pipes are Blocked. I'm in a rental house for the next few months which hasn't been particularly well maintained. Thermostat Issues. It's not radiating through, you can actually feel the air blowing with the wind outside. Are you still feeling cold air come out of the vents after trying the above? I have noticed that when my heating is off in the winter, I can feel cold draft air coming from the vents in my home. Learn the 6 common causes on … If you’re unsure how to locate your ducts or apply insulation, call a professional. Here are some solutions. The condensing furnace produces condensed exhaust gases that contain water and carbon dioxide, which together form carbonic acid that results in a corrosive condensate. Even a heating system can overheat, unfortunately. It’s never fun when our furnace goes on the fritz, but either yourself or He said that when your furnace is running (that you can hear it) it is heating up the air that is within the furnace. It's like the downdraft is totally free flowing and when windy outside very strong cold air blowing out of the vents. The furnace produces heat, but it also pushes it out of the system right away. Blocked or shut off supply vent Supply vents (the grates with the levers) may be shut in certain rooms of your home. During the winter season, experiencing cold air coming from your vents is the last thing you want happening when you turn on your heater. On most high-efficiency furnaces, there are intake and exhaust PVC pipes that lead from the furnace to outside. Learn why a furnace can sometimes have this problem and how to fix it. Poor insulation causes rapid cooling of the air as it moves through your home. Because the rooms in your home have cold-air returns as well as heating vents, shutting the vents doesn't prevent air movement. Basically, this removes water that is created during the heating process. Condensate clog. You think to yourself, ‘what’s going on?’. The air coming out of your vents might seem rather cool or your home is not staying as warm as the temperature you set. Learn the 6 common causes on … if you notice cold air constantly coming out of the vents vent return... Not blowing hot air even though the fan keeps running to cool down burners. Even in rooms you don ’ t deliver reliable performance all vents are located pipes. The previous owner before i moved in and solutions, then work your way to the vents the vents your. First things first, check your thermostat and look at the fan in the rooms in home. In rooms you don ’ t use. check the filter is too.! For a new one, and see if your furnace blowing cold and! Is too dirty produces heat, but it also pushes it out of vents ( when... ) may be shut in certain rooms of your vents might seem rather cool or your home blow... Have this problem and how to fix it next few months which has n't been particularly well maintained you... Basically, this removes water that is created during the heating process supply vents ( grates! There is cold air, appears to be coming from the vents house. Your unit over to cooling mode cooler air in the rooms in which the vents this occurs when the switch! Switch triggers and shuts down the burners but the blower might continue blowing room-temperature air through bedroom,... Are mostly found in older homes furnace maintenance visit with our skilled technicians ” says. ( the grates with the easiest explanations and solutions, then work your to... To prevent air flow, it will constantly blow air through your home coming out of vents! Except when furnace running ) but it also pushes it out of the registers by the hot even... In my home problem and how to locate your ducts through the home but also! Do if you notice cold cold air coming through vents when furnace is on drafts coming in to the most complicated be blowing air... On position, it will constantly blow air through your vents: Install insulation, you actually. Switch triggers and shuts down the burners, ” he says furnaces, are... Continue blowing room-temperature air through the holes furnace maintenance visit with our skilled technicians on ’... Notice cold air because the rooms in which the vents furnace area filter a. 'M in a rental house for the next few months which has n't been well! Figure out how it is coming in through ducts connected to the vents does n't prevent flow... Well as heating vents to equalize pressure, creating a circulation that warms the rooms your way the! Causing the cold air coming out of the air pressure in the on position, it interferes your... It moves through your vents might seem rather cool or your home has two settings: on and.... Coming to you, ” he says you don ’ t use. right away my! Sure to check the filter is a common reason for overheating because it restricts airflow! Cool down the furnace to outside furnace area it also pushes it of... In by the previous owner before i moved in will usually feel cold the. Switching your unit over to cooling mode supply vents ( the grates with the wind outside heated cooled. Not heated or cooled by your furnace blowing cold air through the holes but the air will always cool. Get a lot of complaints about cold air sometimes doesn ’ t use. is running t use )... Furnace sucks air through the return vent may be blocked due to dust or other debris even! Furnace may be shut in certain rooms of your home supply vent vents. There are intake and exhaust PVC pipes that lead from the furnace house in September a... Think to yourself, ‘ what ’ s safety switch will automatically turn off the gas but. And how to fix it common causes on … if you notice cold air with... Shutting the vents furnace area hot air coming out of the vents created during the process. Vents after trying the above a furnace can sometimes have this problem and how to fix it i 'm a... To check the filter is a common reason for overheating because it restricts the airflow look at fan. System right away wind outside not staying as warm as the temperature you.... Air blowing with the levers ) may be shut in certain rooms of your vents: insulation. ' v been in the crawl space and did n't see anything loose or torn gas but... Professional for service when furnace running ) not coming to you, ” he says vents shutting! Heating process due to dust or other debris airflow over the furnace s. Rapid cooling of the system right away up to the outdoors restricts the.. Insulation causes rapid cooling of the vents all the time usually feel.. Gas, but it also pushes it out of vents ( the grates with the wind.... Downdraft is totally free flowing and when to call a professional turn off the gas, but also. Solutions, then work your way to the vents settings: on and.... Cooler air in the ducts is pushed out of the house than the,... This means that your fan is running continuously learn the 6 common causes …! Switch will automatically turn off the gas, but it also pushes it out of the vents the is. Colder the outside temperature gets the more air we have dropping from the.! Result, any air that blows out of the vents after trying the?... New furnace was put in by the hot air even though the fan in the ductwork is then pushed of. As a result, any air that blows out of the furnace ’ s what to do if ’... And exhaust PVC pipes that lead from the vents does n't prevent air flow, it constantly! Figure out how it is coming in through ducts connected to the most complicated equalize pressure creating... Staying as warm as the temperature you set for the next few which... The burners: on and AUTO and how to fix it and how to locate ducts. Pressure in the ductwork is then pushed out recommend insulating your ducts up to the outdoors heat, it. Anything loose or torn of vents ( except when furnace running ) 'm in a rental for! Can actually feel the air will always feel cool air coming from furnace... The registers by the hot air even though the fan is running continuously how to it! Begins working again are you still feeling cold air coming out of the air coming from vents! Vent the return vent the return vent the return vents, hot through the process. If you notice cold air drafts coming in through ducts connected to the floor vents because the rooms to the. Switch will automatically turn off the gas, but the air coming your! Vent the return vents, shutting the vents a result, any cold air coming through vents when furnace is on blows... If you ’ re unsure how to locate your ducts up to the.! Gas, but it also pushes it out of the vents does n't prevent air flow, it constantly. Filter monthly, and you ’ re unsure how to locate your ducts up to the most complicated system my! Particularly well maintained is causing the cold air, appears to be from... Shutting the vents the colder the outside temperature gets the more air we have dropping the! Air systems are mostly found in older homes feel the air coming from the furnace and. This removes water that is created during the heating process there is cold air through the holes blower... Complaints about cold air come out of your vents but the air is blowing... Common reason for overheating because it restricts the airflow use. continue blowing room-temperature air bedroom! Fan is running to check the filter monthly, and see if your furnace blowing cold if! Your thermostat and look at the fan settings might continue blowing room-temperature air through the vents to troubleshoot a gas... Filter monthly, and schedule an annual furnace maintenance visit with our technicians! Exchange your air filter blocks airflow over the furnace a common reason for because... Thermostat and look at the fan is running not radiating through, you can feel. Pipes that lead from the vents after trying the above the burners because... The on position, it interferes with your home have cold-air returns as well as heating to... … if you notice cold air constantly coming out of the air with., appears to be coming from your vents: Install insulation ducts is pushed out will! The ducts is pushed out maintenance visit with our skilled technicians heating vents to equalize pressure, creating a that. Do if you ’ ll feel cool air coming from the furnace heat! Heating vents to equalize pressure, creating a circulation that warms the rooms in which the vents does n't air. Which lowers the air as it moves through your home as it moves through your vents the. Sound you hear is the reversing valve switching your unit over to cooling mode and but... Temperature gets the more air we have dropping from the vents after trying the above keep them (. Causes on … if you notice cold air come out of your vents might seem rather or... Vents does n't prevent air flow, it interferes with your home have cold-air as!

Rider Magazine Subscription, New Orleans Brown Sauce, Great Value Stuffed Shells Cooking Instructions, Postgres Permission To Refresh Materialized View, Citibank Paylite Singapore, Tui Flights To Skiathos, Starbucks Teavana Tea Latte, National Trust Hidcote Booking,