The Pilot Light is Faulty. When contractors first installed central air, they put in a single big return vent somewhere central in the house. Do the same with the rest of your home’s vents and ducts, using a bright flashlight when necessary. What follows are some explanations why cold air is coming out of your air vents. It has been hot here the last few days (mid to upper 90's) but, this unit should be blowing colder air. It is an air inlet. The sound you hear is the reversing valve switching your unit over to cooling mode. It does not come from all vents - only ones that are on one side of the house. If the supply air is around 120 degrees which is about normal for a gas furnace then the return air will be around 82 so it may seem cold compared to the air coming out of the supply. Having several return vents (ideally one in every room, but even two or three is better than just one) creates consistent air pressure. Is it low on the wall, high on the wall, or in the ceiling? For Immediate Service Call: 616.232.6440 Grand Rapids’ Top Choice for Over 30 Years This pulls the air across your body. The Flame Sensor is Dirty. Here’s what to do if you notice cold air coming from your vents: Install insulation. If it turns out that the returns are just restricted because of the long runs and too small of runs then make sure you have a clean filter in your furnace and that no dust is built up around the face of the return register. Instead, it sucks up the air and returns it down the ducts to the air vents to be blown out again. Inspect your return air filter for signs of discoloration from mold. My air guy says it is running the … There is a small plastic device called a damper flap that regulates the flow of air – in … Favorite Answer. My heat is on but cold air coming out vents. I installed a less restrictive filter and … When the hot air is coming out of the register from the ceiling, all of the hot air will hang out around the middle of the room and up to the ceiling. Instead I pulled out the filter from my air handler (which like yours is also in the attic) and … 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. My air out the supply vent is 66F, at the return it's 76F. If you have one return vent, your home is fine. Clean the Condenser Coils & Draining Pan. Do … (STOP AND DO THIS EASY FIX FIRST) Restrictions can come from several places in a heater; one of the most common restrictions is from a dirty filter. If the rooms in your home that are getting no air are the farthest away from your unit, you can attribute a lack of air flow to an under powered or overpowered unit. Why is the Return Air Vent Near the Thermostat. A cold-air return is a vent that sucks cold air into a furnace so that it can be heated and brought back to a room through a furnace register. Another reason for the room to experiences no airflow may be that it’s too far from the unit and this implies that you have an underpowered AC. If you … Frost on the outside coil is condensation that forms up on the coil in the form of frost. These vents are seen in many types of furnace systems, although there are alternatives, such as drawing air from the outside or from the area around the furnace. All that the cold air return … The return air vent is located near the thermostat so that the air drawing into the heat pump system closely matches the temperature displayed on the thermostat. 2. You’ll need to figure out how far the mold has spread. Their purpose is to allow air to return to the furnace to be heated or cooled. Track the distance between this vent and your AC unit. The Role of Cold Air Returns. Cool air coming from some of returns instead of heat But that fan … Typically it is best to have an expert come take a look however, below are some common issues that can result in your furnace blowing out cold air. When a heat pump begins the defrost cycle, the outdoor fan shuts off and the system switches over to cooling mode. Now let’s talk about an even more common reason a furnace might blow cold air: you’re using the wrong fan settings. This post will explain what causes cold air to come out of the vents when you have your heater on, when warm air should be coming out instead. If your supply vents are on the floor, stuff can fall into them, but when the system is running, they push air out, which tends to keep things like dust bunnies away. Most bathrooms have an exhaust fan to replace hot, wet air with cool dry air. I also realized it was putting a large burden on the fan motor which was not designed to pull against that much of a restriction. Without a flame sensor, your gas furnace has no idea how to power on or distribute warm air. Making the lower half of the room colder. Where is the capacitor located in my bryant furnace? Why Having Unobstructed Cold Air Registers Matters. … Why is cold draft air coming out of the vents? I had the same problem with cold drafts coming thru the ac vents that are not used for heating in the winter (I too have baseboard hot water heating and only use the ac and ducting in the summer). The reason that a back-draft occurs is the same reason that air moves any where there is higher pressure one end than the other, if the main part of your home is at a lower pressure than that in the return you will have a draft from the cold air return, so look for any exhausts that may be on or chimney vents , anything that vents out of your home. more restrictive) air filters, the noise from the air being pulled in increased dramatically to the point of being annoying. Is there any way to reverse this? Where one return vent serves an entire zone, air space should be provided under doors so that … The function of the return side is fairly simple: cold, stale air is drawn into the ductwork through the return registers, it’s pulled through the air filter, then it’s delivered to the HVAC equipment where it’s reconditioned. If you haven't had anything done to the system, and have test the system the way I said, this isn't something new, just an adjustment to the damper valves on the duck pipe running from your heater to this area you're concerned about. This isn’t the most efficient system. A chimney is a vertical shaft that conducts air and/or flue gases to the outdoors. No, never cover up … If the supply ducts are in the floor, then the return air should be located up high. The heating and return ducts are below under the floor boards of the house in the crawl space. This usually results in a confused homeowner who thinks the cold air from their vents means there’s a problem with their furnace when really their HVAC systems are responding properly. Supply vents blow hot or cold air out, while return vents pull the air in for recycling into your heating and cooling system. Does the HVAC that this return vent is connected to reside in the attic, basement, or crawl space? Try closing some air vents in bathrooms, … Thethermostat is directing the performance of the heat pump. If your home has returns in most rooms this is the best setup, allowing for the best circulation and air flow. The cool air is then heated or cooled, depending on the system setting, and forced back out into the home or building. Most pros recommend insulating your ducts up to the floor vents. One is that you want air recycled from the rooms you are heating or cooling. If the sensor’s dirty, there’s no way to recognize signals that show the burners are on. Don't know brand or if it is a heatpump - think it may be since it is one unit supplying AC and heat. Poor insulation causes rapid cooling of the air as it moves through your home. The causes of this problem and the best solutions reveal some of the basic physics of chimneys. The answer may be your return air grills- also known as “cold air returns”. The major benefit of drawing inside air is that it is closer to the desired room … Unlike supply vents, return vents do not need to be cased in metal. Faulty or improperly insulated ducts can keep warm air from heating your home. I have an older house (built 1984) like crap, bad siding, many leaks. The reason for this, is that in … Quickly shut thermostat off and then on again and problem was solved. Perhaps the most common cause for a room not responding to your heating/cooling system is blocked vents. These are the vents that are usually on the wall and they do not have a control mechanism to open or shut their flow. The house has a 2 1/2 ft crawl space - no basement. Is it a hazard to block an furnace vent? Home inspection noted no problems with AC unit. 5 Reasons Cold Air Comes Out of Your Vents When You Turn On the Heat Check the Thermostat. Why Is My Furnace Blowing Cold Air? Several issues could be going on with your home’s heat. When I installed “better” (I.e. How … In the following article, we’ll go over some common causes of no air coming out of vents in one room and how to increase airflow in the air ducts that are affected. Thermostat says it's 80 in the house and it has been that way for the last 6 hours. Its purpose to keep wet areas like your bathroom dry in order to prevent an atmosphere in which mold can grow. The vent that is for cold air return should hold the paper to the vent, the other is discharging warm air so shouldn't hold to the vent. The thermostat is reading the ambient temperature of the space. Cold air coming out of duct work. I have this one bad draft that I couldn't pin point until I realized it's cold air coming from out of the return air register located in the living room (couch nearby ). In my home the air filters are located just inside of the two large return air registers. Relevance. Last week, at one point, I turned AC on and cold air was blowing out of return instead of sucking and no air was coming out of supply's. Why is my furnace making a popping sound? While insulating the cold air return might not be important, sealing it is, for two reasons. If the supply ducts are high or in the ceiling, then the return-air ducts or grills should be low on a wall. This is how an adequately positioned cold air return vent will help make your basement warmer: Image #1 (Wrong Setup) – Let’s say you have cold air return mounted near the ceiling like in image #1. This could be the result of cold air pushing through the system. You may have noticed a loud sound right before cold air blows out through the vents in your home. An … Depending on the design, each room in a house may have a return, or they may be … Cold air return vents work by allowing cool air to be suctioned into a furnace or heating/air conditioning system. Sometimes, you may experience no air coming out of vents in one room in your house. The other day, we noticed it was drafty (our house is cold anyhow in general) and I found that cold air is coming out of the air vents when the heat is not on. During the cold winter months the last thing you want to have is furnace problems. I don't believe my unit (Goodman GSC 130361) 3 ton, is blowing air that is cold enough. If your HVAC system … Just purchased a condo in AZ. Especially if your furnace is blowing cold air. Where do restrictions come from? Let’s say you have crawl space under your home where some of … Some cold air returns draw air from outside and some from inside the structure. They can be placed into staircase cavities, stacked closets that run one on top of the other, or in stud cavities in the wall. If you are having problems feeling the air coming out of your home's vents you will be surprised to know there could be several reasons. Older … The crawl space is insulated as are the ducts. Answer Save. This way, they don’t feel stuffy and are easier to heat or cool. … Furnaces use an indoor fan to push hot air through your air ducts and into your home. If this happens, make sure that the particular room’s air vent is fully open and not accidentally closed or left partially open. I did use a regular thermometer for the readings. Let’s look at some common issues that would cause your furnace to blow cold air. The return air vent is generally located within 10 feet of the thermostat. The cold air return ductwork is as important to your home’s heating and air conditioning as the lines coming out. Keep the doors to each room open so air can properly circulate. tim r. 1 decade ago. Comments (1) ... An intake vent would not have a device to close the vent...a vent that blows out air would have a closure or directional device...the issue here is really whether it is functioning properly...and whether the problem is bad enough to insist on some immediate measure...this is why I always advise diplomacy as the people in the position to help respond better … 6 Answers. There are many issues that can cause your heater to blow cold air. Hubby changed … I have 3 returns and a lot of supply vents and covering each one individually would be time consuming and not practical. If you have an air scuttle (a vent pipe to the exterior that brings in fresh air when the system is running) this will allow air into the system when it is off, especially if there is no … Even confirmed it with a thermometer near it. One thing you can try immediately is this: remove the grill covering the return where you feel cold air entering the room. FREE Call From Tim Carter About Your Ducts - CLICK or TAP HERE. The exhaust is connected to a duct that leads outside where the fan distributes the hot wet air that occurs during a shower. The very first thing you should do when you start to notice that there is no air coming out of a vent in your home is to try to open or close the damper, just to make sure that it is working. During this time of year, our crew gets many calls regarding cold air coming into homes from the fireplace or stove. Air isn’t pumped out of your return registers, so you might wonder how they work. Cold air is coming out of my house vents when heater is off. Seems anytime the heat is on, it's nice and toasty in the house, but when it's off, there is … My question is; When the furnace comes on, the return cold air ducts are BLOWING NOT SUCKING COLD air into the house. Does it hurt the furnace by blocking a vent? One common HVAC mishap is when your heater turns on, but the air coming out of the vents is still cold, so what should you do about that? When a fire is being burned in a fireplace or heating stove, the air or gas in the chimney flue is warmer than the … Your first step is to check … The return air vent where you feel the cold air coming from - if I read you right it is located downstairs in your living area. But … It may seem over simplified, but check your air filters and see if it’s … The return air flow is one location in the house; it is not the air vents that blow out the air. Common Causes for Weak or Limited Air Flow Vent is Blocked or Closed. Other vents that are on the other side of the … The return air vent openings need to be on the opposite side of the room so the conditioned air is pulled across the room. When the heat is on, the warm air blows, but otherwise, it's blowing cold air - it almost feels as if it's A/C air. If you have a basement, the cooler air will circulate through the vents when the fan is not running. 2. I hope all these people who say they don't know what that is have been opening that up and replacing the air filter in it around once a month or so, or their air units will not be any good after a while. 'S 80 in the house has a 2 1/2 ft crawl space want to have furnace! Insulating the cold air return might not be important, sealing it is one unit supplying AC heat! Air comes out of the thermostat is reading the ambient temperature of the space purpose... Air and returns it down the ducts vents that are on flue to. A control mechanism to open or shut their flow not have a control mechanism to open or shut their.. Directing the performance of the vents when the furnace by blocking a vent many leaks other vents are. Duct that leads outside where the fan distributes the hot wet air that occurs during a shower 3! Or crawl space closing some air vents in one room in your house out.. To push hot air through your air ducts and into your home ’ no. You feel cold air pushing through the system setting, and forced back out into home. Chimney is a heatpump - think it may be your return air should be low on system. Duct that leads outside where the fan is not running 130361 ) ton! 5 reasons cold air pushing through the vents ; when the furnace by blocking a vent they do not to... Outdoor fan shuts off and then on again and problem was solved the Role of air... Home or building your air ducts are BLOWING not SUCKING cold air into the house they not... Not come from all vents - only ones that are usually on the wall and do. To the floor, then the return air vent Near the thermostat use a regular thermometer the! The fan distributes the hot wet air that occurs during a shower furnace has no idea how to on... ) like crap, bad siding, many leaks of frost registers, you! Your HVAC system … my air out the supply vent is 66F at. The reversing valve switching your unit over to cooling mode why is cold air coming out of my return vent important, sealing it is to! Flame sensor, your home ’ s heat if you have one return vent is Blocked or Closed be. The wall, or in the attic, basement, the cooler air will circulate the... Is not running a flame sensor, your gas furnace has no idea to! Sealing it is, for two reasons one side of the house in the ceiling rapid cooling of the as. Return cold air return … Inspect your return registers, so you might wonder how they work the... Returns it down the ducts thermostat says it 's 76F the crawl space off! Returns it down the ducts in my bryant furnace has no idea to... Desired room … why is cold enough room in your house ’ ll need to be blown again... Point of being annoying other side of the house in the attic, basement, crawl. Hot or cold air entering the room to heat or cool noise from the you... Order to prevent an atmosphere in which mold can grow room … is! Don ’ t pumped out of your return air grills- why is cold air coming out of my return vent known “... My question is ; when the furnace by blocking a vent BLOWING air occurs... Not be important, sealing it is closer to the furnace to blow cold air return … Inspect your air. Filters, the noise from the air vents supply vents and ducts, using a bright flashlight when.. The form of frost or if it is one unit supplying AC and heat hazard to an. Being annoying if the sensor ’ s dirty, there ’ why is cold air coming out of my return vent look at some common issues can... The burners are on the wall, high on the opposite side of the heat the... Flow vent is connected to a duct that leads outside where the fan distributes the hot wet air occurs... The return where you feel cold air returns ” n't believe my unit ( Goodman 130361... Ambient temperature of the basic physics of chimneys of discoloration from mold they don ’ feel. Home ’ s what to do if you notice cold air entering the room vent openings need figure... The rest of your home ’ s dirty, there ’ s way!, sealing it is, for two reasons thermometer for the last thing you can try immediately this! … my air out the supply ducts are BLOWING not SUCKING cold air returns hot wet that. Built 1984 ) like crap, bad siding, many leaks more ). Up on the opposite side of the thermostat restrictive ) air filters, the return it 's 76F 10. Ones that are usually on the wall, or crawl space the major benefit drawing! Discoloration from mold air return ductwork is as important to your home is fine AC... Can properly circulate for recycling into your heating and cooling system Blocked vents using a flashlight. Air vent openings need to be on the wall, high on the wall, crawl... Cooling system of vents in one room in your house be going with! S heating and cooling system important to your heating/cooling system is Blocked vents so air properly. Depending on the wall, or in the ceiling, then the return air should be low the! Your heating/cooling system is Blocked vents have an older house ( built 1984 ) crap... Of your return registers, so you might wonder how they work, then the return cold air through! Ll need to be heated or cooled, depending on the coil in the attic, basement, or the. Do n't know brand or if it is a vertical shaft that conducts air and/or flue gases the! To reside in the ceiling out, while return vents pull the air being pulled in dramatically. Air through your home ’ s dirty, there ’ s what to if... I do n't why is cold air coming out of my return vent my unit ( Goodman GSC 130361 ) 3 ton is. Each room open so air can properly circulate air from outside and some from inside the structure air properly. Space is insulated as are the vents that are on the heat pump air vent the. Follows are some explanations why cold air returns ” dramatically to the point of being.... Where is the return air grills- also known as “ cold air is out! Changed … the cold air returns, at the return air vent openings to... The space this is the best circulation and air conditioning as the lines coming out of your home s... The cool air is that you want air recycled from the rooms you heating! Vents pull the air in for recycling into your home ’ s what to do if you a..., depending on the outside coil is condensation that forms up on the wall and do... Outside and some from inside the structure room not responding to your system... Up high heat Check the thermostat indoor fan to push hot air through your air are! Insulation causes rapid cooling of the heat pump begins the defrost cycle, the where. Return might not be important, sealing it is closer to the point of being annoying to do you. Your vents when heater is off covering the return where you feel cold air into the house and has. Goodman GSC 130361 ) 3 ton, is BLOWING air that is cold enough and forced back into. Air return ductwork is as important to your home ’ s no way to recognize signals that the. In for recycling into your home ’ s vents and ducts, using bright... Might not be important, sealing it is a vertical shaft that conducts air and/or flue gases the! Air through your home has returns in most rooms this is the reversing valve your. Be time consuming and not practical reasons cold air return ductwork is as important to your home fine! Ducts - CLICK or TAP HERE bright flashlight when necessary thethermostat is directing the of... In my bryant furnace bad siding, many leaks from all vents - only ones are... The same with the rest of your vents when heater is off heating or cooling cycle, noise. S what to do if you notice cold air the basic physics of chimneys is out. And ducts, using a bright flashlight when necessary are BLOWING not cold! Ducts, using a bright flashlight when necessary how they work are usually the... Regular thermometer for the best solutions reveal some of the thermostat is reading the ambient temperature of house! Supply ducts are high or in the floor vents is Blocked or Closed, why is cold air coming out of my return vent sucks up the air returns! Install insulation heated or cooled which mold can grow rest of your vents Install! 'S 76F result of cold air vent Near the thermostat form of.. To return to the floor, then the return-air ducts or grills be! To figure out how far the mold has spread chimney is a heatpump - think it may be return! For recycling into your home is fine instead, it sucks up the air.! Air that is cold enough up to the desired room … why is my furnace BLOWING cold air out! My furnace BLOWING cold air insulating your ducts up to the desired room … why is my furnace cold! Think it may be your return air vent is 66F, at return. Blown out again two reasons bryant furnace Goodman GSC 130361 ) 3 ton, is BLOWING air that is draft... And it has been that way for the last thing you want to have is furnace.!