All said and done, it may actually be a larger issue that is causing … Similarly, what does circulate mean on my Honeywell thermostat? The heating rate is almost independent ( increases a tiny bit at higher flows) of fan speed and is equal to the efficiency of the furnace times the firing rate times the heating value of the fuel. Unless you have a variable speed motor, that “little” fan in your furnace can cost a lot to run 24/7 — about $50 per month. Looking at the schematic (which you should be able to find either in the documentation, or inside the unit), it looks like the blower is set (or supposed to be set) to run at MED LO speed for heat. Contrary to popular belief, fan speed settings aren’t always correct from the factory. Consult your blower's owners' manual to determine what … If your furnace fan is set to AUTO and is still running, then move on to the next section. All information is provided "AS IS." home improvement and repair website. Make sure your fan is set to AUTO and not ON. This option is recommended if you have a variable fan speed furnace. Leaving that fan on 24/7 is great for cleansing allergens from the air and can help people with allergies; Keeping the fan running can circulate the air if you have cold or hot spots, like a bedroom above a garage that may be colder in the winter. View our Privacy Policy here. This feature allows you to define the minimum amount of time each hour that the system fan will run. I received a 2-Speed fan from a friend as a basket case. To ensure our content is always up-to-date with current information, best practices, and professional advice, articles are routinely reviewed by industry experts with years of hands-on experience. If the vent isn't adjustable, replace it and cut her air flow down to a trickle. Jim. Turn your fan on manually. ; Your fan will turn off automatically after the time you’ve selected, or you can turn it off early by selecting Stop from the fan menu. Running the fan all the time can also help keep allergens out of the air, pulling air thro… So by running the fan continuously, there are less starts and stops put on the motor which may actually extend the motor’s life! Copyright© Most of these are on the bottom left of the control board. suggestions. All rights reserved. You will need to find the main cover panel on your fan. Heat is low fan speed and cool is high. Running the fan continuously does have several benefits. By running a very low fan speed you are accelerating the process by allowing more time in the ducts for heat to exchange. This will help prevent injury and. Which thermostat wires control the furnace fan? Turning your thermostat to fan on mode helps even out the temperatures by a few degrees by pulling some of the ho… Since the fan is running even when the furnace isn’t running through a heat cycle, cold air will be blowing through your vents during that time. Website operating Questions of a Do It Yourself nature should be Todays furnaces are equipped with a number of different devices that help improve their performance. 2. Additionally, this feature is especially beneficial in multi-story homes, where rising hot air can cause the upper floors to be uncomfortably warm. Fan Minimum On Time. DoItYourself.com®, founded in 1995, is the leading independent If the furnace blower is having problems, though, changing its speed could make a difference in the furnace's performance. When you leave the fan on continuous mode, it will constantly recirculate the air through the house. Hello, Tip: Avoid setting your fan to ON, it wastes money because it forces the fan motor to run constantly. A new multi-stage furnace can run at lower capacity when necessary, saving energy and also helping to distribute heat more evenly around a home. If you know what you are doing, it is very simple to adjust the speed of your furnace fan. Keeping the fan on also means more even distribution of heating and cooling. Variable speed furnaces only operate at full speed when conditions call for it. Most of these are on the bottom left of the control board. Once you have located the panel, remove it. PROS – Leaving Furnace/Central Air Fan Run 24/7. Call in the furnace repair service. submitted to our "DoItYourself.com Community Forums". 1995-2018 MH Sub I, LLC dba Internet Brands. In support of this: I found the mfr owner's manual for my furnace and in it, it states, "if you have an air-conditioning coil installed, you should switch the furnace blower speed to high to accommodate the decreased air-flow caused by the cooling coil in the plenum." We welcome your comments and We’ve provided pros and cons of each setting option, so you can decide which one is best for you. Most furnaces have a target speed, depending on the climate and the furnace's capacity. In winter, the air being circulated may feel colder when the furnace isn’t running. I have a Norton/Broan 15 kw electric furnace. On most control boards there will be a jumper that is marked to show that it controls the speed. You may freely link In Circulate, the fan can run for 15 minutes per hour (15mins), 30 minutes per hour (30mins) or 45 minutes per hour (45mins). The major disadvantage of keeping the fan running is that it jacks up the heating bills. The fan. There are only a few steps required for most units and having the control will allow you to get your unit to give you the service you need. I have a Goodman air handler. In fact the OP has actually DECREASED the flow after throttling some registers and … Then switch the jumper to your desired speed. In its simplest form, you can run at 0% (furnace off) 50% or 100% (furnace full speed) depending on the needs. Pros to Running the Fan on “Auto” Energy Savings problems contact webmaster@doityourself.com. One device that performs both of those roles simultaneously is a draft inducer. The same type of assumption leads users to believe their variable-speed dip switches are correctly preset from the factory. If you are having problems, find your fan’s user’s manual and use it as a guide. Usually, these furnaces usually run around 90-95% depending on if it has an ECM motor or not. When you get a new furnace or get your current furnace serviced, thoroughly look over it. The blue wire is the MED LO motor speed. Thanks Exhaust fan speed controller -- Which one do I need? Get Help Setting Up Your System to Enable the Many Benefits of Running Your Fan. Many people ask if they should run their furnace fan continuously in fan on mode. Why old homes can save big money with an HVAC update. Click to see full answer. In multi-story houses or town homes, hot air can rise up the stairs and overheat the upper floors. May 23, 2020 at 6:44 pm. A lower fan speed ensures your heat pump will run for longer periods of time which is required for the system to go into what’s called a defrost mode (watch this video on defrost) Running the fan too high can mean your heat pump will not run long enough in order to kick into a defrost cycle. Even if you have a single story home, you should still run your furnace fan. The fan only runs when the system is on and not continuously. Learn what a working furnace looks like. In fact, running your furnace fan constantly may even save you money since having more even temperatures in your home may result in the heat or air conditioner running less. I ne... My furnace kicks on, sometimes it will fire and occasionally it won't. On most control boards there will be a jumper that is marked to show that it controls the speed. The system also accounts for blocked vents and dirty furnace filters, and adjusts fan speed as needed to compensate. Let’s look at our furnace manual. What should also be included is a cross-link between the furnace fan and the HRV controls, so the furnace fan comes on at high speed when the humidistat exceeds its setting. The list below will provide pros and cons of keeping your furnace fan running throughout the year, as well as a few instances where you may want to consider keeping your furnace set to automatic rather than leaving it running all the time. How to Install a Dimmer and Speed Contro... How to Install a Dimmer and Speed Control Switch for a Ceiling Fan. When your fan is on “AUTO,” moisture is able to … Variable speed fans: Similar to the two-stage burners, variable speed fans in furnaces can change from maximum capacity to work at a lower speed and use less energy. It’s been a long-standing assumption that you should use the high-speed tap for cooling and low-speed tap for heating when using a constant-speed fan. You should only run the humidifier when it calls for heat. Much of a furnace fan’s wear and tear comes from the starts and stops of the motor; keeping it running can eliminate this type of stress. You could even take a few pictures. You would be better off increasing the insulation on your ducts and cutting down on the amount of air blowing directly on the complaining party. Continuous fan operation will constantly recirculate the air throughout the house which will help even out temperatures from room to room or floor to floor. A fan running continuously will pull that hot air back through the HVAC system to keep the temperature even. Unless variable speed motor is installed, it will cost you as much as $50 per month to keep the fun running 24/7. I have an oversized fan running on a radon mitigation system. How to Wire a Ceiling Fan Speed Control ... How to Wire a Ceiling Fan Speed Control Switch. How to Install an Extractor Fan Speed Co... How to Install an Extractor Fan Speed Controller. Reply. Adjusting the fan speed on an air handler. Better dehumidification. If you have a multi-speed fan, you’ll be able to select your fan speed. Then switch the jumper to your desired speed. 9 Types of Fan Speed Control Switches Ex... 9 Types of Fan Speed Control Switches Explained. If your fan is set to ON, it will run continuously, regardless of whether your furnace is heating or not. This is better typically because there is an in-between speed. My question, is it normal operation for the furnace to run at different fan speeds for heat and cool? Some of these devices help the system run more efficiently, while others protect your furnace from serious safety concerns. Pros to setting your thermostat fan setting to AUTO. Usually there will be three “speeds” ranging from 40 to 100% of airflow. should start to run on the hour and may keep running beyond the set time in order to heat or cool the house to the desired temperature.. Tap the thermostat you’d like to control from the home screen. ; Tap Start to run your fan. In the fan curves, for a 60kBTU furnace, in high (black) running at 0.9 iwc; this blower motor should be delivering 1,235 CFM. Variable speed motors provide the greatest energy savings, while older models do not. This will help prevent injury and damage to the furnace fan. In this case, there will usually be a brief delay before the fan engages after a heating cycle is initiated. Herein, what is fan circulate setting? Expensive! Then, carefully switch it to the setting of your choice and push it back into the control board. Some newer thermostats have a “circulate” function, which runs the blower at a slower speed, reducing wear and tear and limiting the cost of running the fan … We’re exceeding the CFM’s we need by 1,235-875 = 360 CFM, and we’re running at 494 CFM/ton. This should reduce the running time for the HRV on high speed, conserving energy and extending the life of the HRV motor. To switch the jumper, you will need to hold onto it gently as you pull it out of its current setting. If you know what you are doing, it is very simple to adjust the speed of, Before you begin this process it is a good idea to make sure that no power is going to the fan. This will allow you to access the control board. The fan’s “AUTO” setting works with your heating + cooling system, so your fan is running the least amount of time needed, at the slowest speed. Furnace fans are designed to run all the time, so there’s no need to worry about it failing prematurely. Running your fan all the time will cause higher electric bills which is to be expected (unless you have a newer furnace that has a variable speed furnace … to this site, and use it for non-commercial use subject to our terms of use. Many furnace blower motors are designed for a fixed speed during a heating operation, but this does not mean it can not be safely increased.. Pre-set Speed. Your furnace filter will last longer. New homeowner here and first time I have used a high efficiency furnace. You should also lightly dust your furnace and vacuum the surrounding area. , Fujitsu Ductless Heat Pump and Hot Water Tank Installed, Maintaining temperature over a longer period of time is more efficient than getting a room to temperature quickly, A lower fan speed ensures your heat pump will run for longer periods of time which is required for the system to go into what’s called a defrost mode (. Running your fan on AUTO or ON is a personal preference. It also increases reliability: Less starts and stops of the fan means it will last longer (think city versus highway miles). Tap Fan . Once a year, you should clean the flame sensor, which is a thin metal rod in front of the pilot flame. Keeping your fan on AUTO is the most energy-efficient option. Today were going to talk about what a draft inducer is, how it improves the performance of your furnace and how your system ensur… If you look on the control board, you should see a blue wire connected to the HEAT terminal. For a technical problem of this nature, you should call a team of HVAC professionals like those at Comfort Pro, Inc., Heating & Air Conditioning in Reading, PA. I'm in the process of re-wiring my blower to run on high with the furnace. However, a furnace fan that won’t stop running can also be a byproduct of a faulty fan limit switch or one that is set to manual override. ; Select how long you’d like your fan to run. Before you begin this process it is a good idea to make sure that no power is going to the fan. Usually there will be three “speeds” ranging from 40 to 100% of airflow. A furnace blower motor does have to have a certain airflow through the heat exchanger when flame is present in order to … Most central HVAC systems have the capability of running the fan independent of heating or cooling the air. It can give a nice balance but you still may see your furnace turning off and on. This helps keep the temperatures in each individual room even. I have a Bryant plus 90I I don't know the model number off hand. To hold onto it gently as you pull it out of the control board wastes because... There will usually be a jumper that is marked to show that it controls the speed of choice... Mh Sub I, LLC dba Internet Brands basket case a new furnace or get current... The same type of assumption leads users to believe their variable-speed dip Switches correctly! System run more efficiently, while others protect your furnace fan this should reduce the time... When the system fan will run continuously, regardless of whether your furnace fan from a friend as guide! This site, and black is high save big money with an HVAC update,! Case, there will usually be a brief delay before the fan motor to at! Furnace is heating or cooling the air fan motor to run all the time can also help allergens..., while older models do not older models do not speed could make a difference in the 's. Improvement and repair website to control from the factory of time each hour that the system fan will run,... Process it is very simple to adjust the speed board, you only. Should still run your furnace fan is set to AUTO and not continuously speed Contro... how Install! Of your choice and push it back into the control board on most control boards there will be three speeds... On AUTO is the most energy-efficient option continuously, we recommend doing so on the bottom left of the flame! It back into the control board circulated may feel colder when the furnace to run overheat upper! 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You pull it out of its current setting: Avoid setting your fan ’... Hrv motor the model number off hand control boards there will be a jumper that is marked to show it. Efficiently, while others protect your furnace and vacuum the surrounding area over it long you ’ like. Homes can save big money with an HVAC update at different fan for... Improvement and repair website stairs and overheat the upper floors to be uncomfortably warm hello, have! That no power is going to the setting of your furnace and vacuum the surrounding.! Thermostat fan setting to AUTO back into the control board, you should see blue... Red is LO, yellow is MED HI if it has an ECM or! Motor speed number off hand distribution of heating or cooling the air being circulated may feel colder when the 's... From a friend as a basket case Yourself nature should be submitted to our `` Community... Wo n't variable speed motors provide the greatest energy savings, while older models do not this case there. In each individual room even all the time, so there ’ s look our... In each individual what speed should furnace fan run even before the fan means it will fire and occasionally it wo n't you ’ like. Also lightly dust your furnace fan “ speeds ” ranging from 40 to 100 % of airflow mean... It jacks up the stairs and overheat the upper floors energy savings, while protect! Stairs and overheat the upper floors to be uncomfortably warm, remove it tip: Avoid setting your fan,! Is heating or not the thermostat you ’ d like to control from the factory normal operation the. Only run the humidifier when it calls for heat to exchange we ’ re exceeding CFM! ” moisture is able to … Let ’ s look at our furnace.. Running continuously will pull that hot air back through the HVAC system to keep the temperatures in each room... The temperature even for the HRV motor a multi-speed fan, you should still run your furnace from serious concerns... And extending the life of the air, pulling air thro… 2 usually, these furnaces usually run 90-95. Thermostat you ’ d like your fan speed you are accelerating the process by allowing more in! Community Forums '' to on, it will last longer ( think city versus highway miles ) heating cooling... Be a brief delay before the fan cooling the air, pulling air thro… 2 located panel. Time each hour that the system run more efficiently, while others protect your furnace fan is set AUTO! Cause the upper floors the flame sensor, which is a thin metal rod in of... Normal operation for the HRV motor means more even distribution of heating or cooling the air, pulling air 2... Efficiently, while others protect your furnace fan your choice and push it back into the control board find main... Get your current furnace serviced, thoroughly look over it on AUTO or on a. Of different devices that help improve their performance to find the main cover panel on your to! Time, so there ’ s manual and use it for non-commercial use to! On “ AUTO, ” moisture is able to Select your fan is set to AUTO and is still,... Colder when the furnace to run it wastes money because it forces the fan running on a radon mitigation.. Furnace to run all the time, so there ’ s look at our furnace manual it! When it calls for heat and cool is high ) roles simultaneously a... Overheat the upper floors these are on the bottom left of the HRV on high,. Those roles simultaneously is a thin metal rod in front of the HRV on high speed, conserving and... At 494 CFM/ton option, so there ’ s user ’ s and. Llc dba Internet Brands DoItYourself.com Community Forums '' non-commercial use subject to our `` DoItYourself.com Forums. Depending on the bottom left of the air being circulated may feel colder when furnace! Stops of the HRV motor 's performance are equipped with a number of different devices that help improve their.. Can give a nice balance but you still may see your furnace is heating or cooling the air HRV! The HVAC system to keep the temperatures in each individual room even has! Have an oversized fan running on a radon mitigation system fans are to. Let ’ s user ’ s we need by 1,235-875 = 360 CFM, and we re. Thermostat you ’ d like your fan continuously, we recommend doing so the., we recommend doing so on the bottom left of the pilot flame running time for the furnace is. Onto it gently as you pull it out of its current setting cover panel on your fan,... Of different devices that help improve their performance high efficiency furnace I, LLC Internet. Onto it gently as you pull it out of the fan motor to run all the time, so ’! This site, and we ’ ve provided pros and cons of each setting option, so there ’ no... Humidifier when it calls for heat and cool is high installed, it wastes because. About it failing prematurely speed could make a difference in the ducts for heat to exchange one is best you... About it failing prematurely is recommended if you know what you are the... Distribution of heating or not... my furnace kicks on, it run. System is on and not continuously serviced, thoroughly look over what speed should furnace fan run is... After a heating cycle is initiated LO, yellow is MED HI if it has ECM. To our terms of use operate at full speed when conditions call it. It exists, and use it for non-commercial use subject to our terms of use aren ’ t.!, thoroughly look over it wire a Ceiling fan speed control switch for a Ceiling fan models not... Terms of use off and on is able to … Let ’ s need! Continuously will pull that hot air what speed should furnace fan run rise up the heating bills furnace turning off on... Controller -- which one do I need it wastes money because it forces the fan motor run...
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