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. 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. Depending on the design, each room in a house may have a return, or they may be … If the supply ducts are in the floor, then the return air should be located up high. tim r. 1 decade ago. The heating and return ducts are below under the floor boards of the house in the crawl space. The causes of this problem and the best solutions reveal some of the basic physics of chimneys. Instead I pulled out the filter from my air handler (which like yours is also in the attic) and … Answer Save. Where do restrictions come from? There are many issues that can cause your heater to blow cold air. The house has a 2 1/2 ft crawl space - no basement. An … The Flame Sensor is Dirty. During the cold winter months the last thing you want to have is furnace problems. 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. When a fire is being burned in a fireplace or heating stove, the air or gas in the chimney flue is warmer than the … Several issues could be going on with your home’s heat. Is there any way to reverse this? One is that you want air recycled from the rooms you are heating or cooling. I installed a less restrictive filter and … How … Why is the Return Air Vent Near the Thermostat. Their purpose is to allow air to return to the furnace to be heated or cooled. 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. If you … The major benefit of drawing inside air is that it is closer to the desired room … 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. Keep the doors to each room open so air can properly circulate. The crawl space is insulated as are the ducts. They can be placed into staircase cavities, stacked closets that run one on top of the other, or in stud cavities in the wall. Making the lower half of the room colder. My heat is on but cold air coming out vents. When contractors first installed central air, they put in a single big return vent somewhere central in the house. Cold air coming out of duct work. Relevance. Is it low on the wall, high on the wall, or in the ceiling? The cold air return ductwork is as important to your home’s heating and air conditioning as the lines coming out. My question is; When the furnace comes on, the return cold air ducts are BLOWING NOT SUCKING COLD air into the house. 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. Is it a hazard to block an furnace vent? If the sensor’s dirty, there’s no way to recognize signals that show the burners are on. 2. 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. Does the HVAC that this return vent is connected to reside in the attic, basement, or crawl space? Frost on the outside coil is condensation that forms up on the coil in the form of frost. This isn’t the most efficient system. The return air vent openings need to be on the opposite side of the room so the conditioned air is pulled across the room. Quickly shut thermostat off and then on again and problem was solved. 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. 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. This pulls the air across your body. 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. 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 return air vent where you feel the cold air coming from - if I read you right it is located downstairs in your living area. Let’s look at some common issues that would cause your furnace to blow cold air. Unlike supply vents, return vents do not need to be cased in metal. Older … 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). 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. Common Causes for Weak or Limited Air Flow Vent is Blocked or Closed. It is an air inlet. Just purchased a condo in AZ. 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. Track the distance between this vent and your AC unit. 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 ). … 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. During this time of year, our crew gets many calls regarding cold air coming into homes from the fireplace or stove. If your home has returns in most rooms this is the best setup, allowing for the best circulation and air flow. FREE Call From Tim Carter About Your Ducts - CLICK or TAP HERE. 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. 5 Reasons Cold Air Comes Out of Your Vents When You Turn On the Heat Check the Thermostat. In my home the air filters are located just inside of the two large return air registers. Your first step is to check … Try closing some air vents in bathrooms, … 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. 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