One is that you want air recycled from the rooms you are heating or cooling. Answer Save. 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. Its purpose to keep wet areas like your bathroom dry in order to prevent an atmosphere in which mold can grow. The Role of Cold Air Returns. Some cold air returns draw air from outside and some from inside the structure. (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. 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. Inspect your return air filter for signs of discoloration from mold. My question is; When the furnace comes on, the return cold air ducts are BLOWING NOT SUCKING COLD air into the house. The sound you hear is the reversing valve switching your unit over to cooling mode. When a fire is being burned in a fireplace or heating stove, the air or gas in the chimney flue is warmer than the … If the supply ducts are in the floor, then the return air should be located up high. 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. Why is the Return Air Vent Near the Thermostat. The cold air return ductwork is as important to your home’s heating and air conditioning as the lines coming out. Favorite Answer. Thethermostat is directing the performance of the heat pump. 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. Other vents that are on the other side of the … Frost on the outside coil is condensation that forms up on the coil in the form of frost. 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. They can be placed into staircase cavities, stacked closets that run one on top of the other, or in stud cavities in the wall. 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. The thermostat is reading the ambient temperature of the space. But that fan … Where one return vent serves an entire zone, air space should be provided under doors so that … The cool air is then heated or cooled, depending on the system setting, and forced back out into the home or building. But … 2. The Pilot Light is Faulty. It does not come from all vents - only ones that are on one side of the house. The crawl space is insulated as are the ducts. Supply vents blow hot or cold air out, while return vents pull the air in for recycling into your heating and cooling system. If the supply ducts are high or in the ceiling, then the return-air ducts or grills should be low on a wall. It may seem over simplified, but check your air filters and see if it’s … FREE Call From Tim Carter About Your Ducts - CLICK or TAP HERE. If your home has returns in most rooms this is the best setup, allowing for the best circulation and air flow. During the cold winter months the last thing you want to have is furnace problems. I have an older house (built 1984) like crap, bad siding, many leaks. During this time of year, our crew gets many calls regarding cold air coming into homes from the fireplace or stove. Cool air coming from some of returns instead of heat Why Is My Furnace Blowing Cold Air? Sometimes, you may experience no air coming out of vents in one room in your house. Seems anytime the heat is on, it's nice and toasty in the house, but when it's off, there is … For Immediate Service Call: 616.232.6440 Grand Rapids’ Top Choice for Over 30 Years If your HVAC system … 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 ). Without a flame sensor, your gas furnace has no idea how to power on or distribute warm air. I have 3 returns and a lot of supply vents and covering each one individually would be time consuming and not practical. Cold air is coming out of my house vents when heater is off. You may have noticed a loud sound right before cold air blows out through the vents in your home. The Flame Sensor is Dirty. more restrictive) air filters, the noise from the air being pulled in increased dramatically to the point of being annoying. 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. When contractors first installed central air, they put in a single big return vent somewhere central in the house. Thermostat says it's 80 in the house and it has been that way for the last 6 hours. Several issues could be going on with your home’s heat. Cold air return vents work by allowing cool air to be suctioned into a furnace or heating/air conditioning system. Most pros recommend insulating your ducts up to the floor vents. Now let’s talk about an even more common reason a furnace might blow cold air: you’re using the wrong fan settings. 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? 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. 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. Hubby changed … Especially if your furnace is blowing cold air. If the sensor’s dirty, there’s no way to recognize signals that show the burners are on. 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. Older … An … It is an air inlet. The heating and return ducts are below under the floor boards of the house in the crawl space. 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). Where is the capacitor located in my bryant furnace? A chimney is a vertical shaft that conducts air and/or flue gases to the outdoors. Just purchased a condo in AZ. The exhaust is connected to a duct that leads outside where the fan distributes the hot wet air that occurs during a shower. 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. When I installed “better” (I.e. 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. The return air vent is generally located within 10 feet of the thermostat. 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. 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. Don't know brand or if it is a heatpump - think it may be since it is one unit supplying AC and heat. 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 … Quickly shut thermostat off and then on again and problem was solved. The major benefit of drawing inside air is that it is closer to the desired room … Depending on the design, each room in a house may have a return, or they may be … I don't believe my unit (Goodman GSC 130361) 3 ton, is blowing air that is cold enough. 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 … Why Having Unobstructed Cold Air Registers Matters. 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. Clean the Condenser Coils & Draining Pan. Keep the doors to each room open so air can properly circulate. How far the mold has spread insulating your ducts - CLICK or TAP.... 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