My ducting goes in the attic to the heat vents in the ceiling. It is much easier on the motor to run constantly than to start and stop all the time. By running the furnace fan all the time, you are also running air through your furnace filter constantly. Thanks for the question, Kay! However, it should not blow nonstop. In milder months, it may only run for a few minutes every hour. In fact, according to a study by the Kentucky Department of Energy (DEDI) homes with ductwork in the attic or crawl space in Kentucky had an average of 44 percent leakage! If you have an efficient filter and a UV light, you are constantly filtering and cleaning the air. We just had a furnace contractor tell us to leave our furnace fan on continuously to even out the heat in the house. If you have a newer ENERGY STAR rated furnace it will have a variable speed motor that is designed to run all the time. The truth is, it varies which is the better choice for you. Please do no keep my email for solicitations, or give to any 3rd parties. Your email address will not be published. If you are located near Lexington, KY, and you’d like us to do a free site visit to give you advice, we’re happy to do so. On 2019-07-06 1 by (mod) - Supco relay used as an A/C fan relay switch. Call us at 859-687-0553 – we’d love to chat with you about your furnace needs. Yes. You should only run the humidifier when it calls for heat. Running a furnace fan constantly also has drawbacks. The exhaust fan turns on first, a second limit switch senses the fan is on the sends a signal to … The fan will start about 40 seconds after the burners light and go off about one minute after the temperature is satisfied. Running the furnace fan all the time can help by constantly pulling the cold air from the lower level and warmer air from the upper level, blending the two, and then redistributing a more stable, even temperature throughout the home. This helps keep the temperatures in each individual room even. If your furnace fan is set to AUTO and is still running, then move on to the next section. The evening sun will do the reverse in the afternoon. If you have an efficient filter and a UV light, you are constantly filtering and cleaning the air. A heating system works by distributing warm around your home. Having an ENERGY STAR rated furnace with a variable speed motor is ideal. Your home’s heating and cooling system will help to balance these issues, but it does not run all the time. With electricity rates in central Kentucky, it will cost the average homeowner less than $3 per month to run the fan 24 hours a day. Pros to Keeping Fan Continuously Running: Less frequent starts and stops of the fan can reduce the stress from startup, and potentially help extend its lifespan. There are several benefits and some drawbacks to running a furnace fan constantly. The number of BTUs, or British Thermal Units, needed to heat your home is dependent on a number of variables. The result is better air quality, since particles are constantly being removed from your air. This can also happen when certain parts in your furnace is broken or damaged. Actually, the opposite is true. Laptop fan is an important component of the laptop cooling system. I live in an area with some hot summer days , with unhealthy wildfire smoke. Also, should I run the humidifier with the fan or just when it calls for heat? This is because different parts of your home will experience different external temperatures throughout the day. Run furnace fan 24/7? Is that the right thing to do? We have an older oil furnace without AC. Running your furnace fan will blend the air throughout the day keeping the air in your home from having noticeable hot and cold spots. Are you in Central Kentucky? Additionally, this feature is especially beneficial in multi-story homes, where rising hot air can cause the upper floors to be uncomfortably warm. I have an old stone wall basement with a drylock sealed cement floor. Tip: Avoid setting your fan to ON, it wastes money because it forces the fan motor to run constantly. In multi-story houses or town homes, hot air can rise up the stairs and overheat the upper floors. I would like to use the fan with a high quality air filter and mix the cool basement air with the warm air of the second story bedrooms and hallway. If homeowners find this is beneficial, it is generally suggested to only run … What is the best way to use the fan so I can clean the air without drawing heat into the ducting from the attic, and not using the air conditioner? If you are in a condo you might want to run your furnace fan only during peak heating and cooling hours. It is considered OK to continuously run a furnace fan. Running the fan will provide for better air circulation throughout the entire home, … Every unit is installed with a “set point”. The most stressful part of any motor’s life is that when it starts. The gas furnace is under five years old and heats up the house quite well. It uses electricity to keep the fan running and therefore causes slightly higher electric bills. Running the furnace fan on continuous low speed is a good idea to improve air movement within your home, but it only makes sense in the heating and cooling seasons. This is why in some houses the basement is always cold and the upstairs is always warmer. Finally someone who knows what they’re talking about! We can calculate the correct size furnace for your home. If you have noticed that your furnace is constantly running, even as the cold weather is starting to ease up, it might be a sign that something’s lurking in your heating system. On 2019-07-06 by (mod) - Goodman Amana Furnace Fan Relay B1370751 B13707-51. If you have an older home you should have your ducts sealed even if you are not planning to replace any equipment anytime soon. During your tune-ups, we’ll inspect your system for any problems like a malfunctioning limit switch that might cause your furnace fan to always be on. If your ductwork is in the attic is one example. Second, troubleshoot for fan limit switch problems Pros to setting your thermostat fan setting to AUTO. Will definitely make use of a few of these techniques By running the furnace fan all the time, you are also running air through your furnace filter constantly. We’d be happy to provide a free estimate on a modern furnace that would be dramatically more efficient than what you have. When you leave the fan on continuous mode, it will constantly recirculate the air through the house. Exhaust fan should only run when the furnace is on. My forced air gas furnace is in the crawl space. Synergy Home Tips > Blog Posts & Articles. We just moved into our new house. If you hear the fan running constantly, you might start to wonder why. Very informative, thank you for all the information! Our home is currently 43% humidity. Many people ask if they should run their furnace fan continuously in fan on mode. The air filter captures dust, pet hair, and debris that could damage the furnace and keeps it from getting to the heat exchanger. Reply: 6 steps to getting heat on when the fan runs but the furnace does not. There are a couple of reasons why you may not want to run your fan. Personally, I prefer “auto,” but let’s take a look at the pros and cons of each now: Auto helps distribute air in the beginning of the cooling or heating cycle and then cuts off when the set temperature is reached. If it’s cloudy and relatively cool outside but feeling stuffy in your home, running the fan for an hour or so can certainly help. Is It OK to Continuously Run Your Furnace Fan. Some HVAC technicians also state that it is better for the fan motor to run continuously instead of turning on and off with the furnace. On the other hand, if you notice that your furnace is still running after it reached your desired temperature, it means the furnace is not getting the message that it’s already accomplished its goal. Running your fan on AUTO or ON is a personal preference. No, we do not recommend constantly running the furnace fan in the heat of the summer, as you will draw attic temperatures into the living space. If you have an older home with a lot of duct leakage it may not be a good idea to run the fan all the time as it may draw in dirty air from places you don’t want. on some of my upcoming projects. Contrary to what you might think, a bigger furnace may not necessarily mean more heating power for your home. There are a few instances where if your furnace fan keeps running it is not a good idea. 2015/10/22 Anonymous said: My fan keeps running with no heat on furnace. Turning your thermostat to fan on mode helps even out the temperatures by a few degrees by pulling some of the ho… Compared it to city miles vs highway miles on a car. 801 Winchester Rd. There are several problems that this can indicate. The auto setting turns the fan on only when the air conditioning or furnace is actively running. So generally speaking, it makes sense to run the fan constantly, or use the circulate option on a thermostat, if there is minimal heating/cooling taking place and you aren’t opening the windows for ventilation or air movement. In multi-story houses or town homes, warm air can rise up to upper floors and overheat those rooms. Normally I would say yes it should help but I’d suggest trying it for a couple of weeks and see if you like the results. Running your home’s furnace fan all the time is not a bad thing. Because hot air is lighter than cold air, hot air will naturally rise and cold air will naturally fall. This ultimately saves homeowners money while also making them more comfortable. To be safe – unless you have a specific reason to keep the fan running constantly, just place your central air or furnace fan setting on auto. Newer motors called ECM motors are more energy efficient than older AC motors. Second, having a fan run constantly leads to higher dust levels in a home, even with expensive furnace filters. Thank you. Is a single speed or variable speed fan better? As hvac guy was leaving he told me to leave the furnace fan running continuously. Don’t run the fan in the heat of the summer? Hi, can you advise if you can operate the automatic fan on an oil fired furnace at the same time turning up the thermostat to bring heat on through via the fan? The most obvious benefit to keeping the furnace fan on the “on” setting is more even heating and cooling distribution. Here are 4 common reasons your furnace is running constantly. When the furnace fan is constantly on, air is continuously cycling throughout the home. The ductwork is not vented in the attic and we do have a high efficiency electronic air filter on the furnace. I have a nice dehumidifer I will run also. Unless you have areas in your home that are problematic for condensation and poor air circulation, seasonal use of this and the HRV should be sufficient. During heating, the fan is controlled by either a timer circuit or a limit circuit in the unit. But if the furnace fan runs continuously, regardless of whether the furnace is heating or not, your furnace fan limit switch is either: Set incorrectly to Manual or Faulty and needs to be repaired/replaced Now that you’ve located your fan limit switch, let’s look at how you can determine whether it’s set correctly or not. OK, thanks again for the advice. If you feel any drafts under your doors/windows, use a towel to block outside air from coming in. Not sure if the furnace fan will do ok without an A/C unit. Even if you have a single story home, you should still run your furnace fan. I have a single story home with vaulted ceilings and a new furnace in the attic. Posted on 18 November 2019 If you notice that your fan is running all the time, you will want to know that this is not how your furnace should be operating. The fan only runs when the furnace tells it to. Also adding indoor air quality products like high-efficiency filters or ultraviolet light systems will greatly improve the air in your home while running the furnace fan, so that you can turn your furnace into a whole-house air cleaner! Less frequent starts and stops of the fan can reduce the stress from startup, and potentially help extend it’s lifespan. This is because. The furnace goes into “cool down” mode and runs the fan constantly. If your heating and cooling equipment is more than 12 years old, it probably came with a one-speed blower motor that cycles between ‘on’ and ‘off.’ These units have conventional split-capacitor electric motors that do not make speed adjustments. I constantly get this question from homeowners in the greater Lexington, KY, area, and the answer is almost always, “Yes!” Almost — but more about that later. What if I have a single story home — should I still run my fan? In addition, it provides extra air filtration which may be helpful if health risks are a concern. We are having heavy wildfire smoke right now and have replaced our filter with a MERV 13 filter and are running the fan continuously, trying to make the inside air safer. Running your furnace fan all the time could save you money each month because having more even temperatures in the home results in the heat or air conditioner running less. Pros to Running Fan on Air Conditioner Continuously: Keeping the fan on creates a more even distribution of heating and cooling, circulating the air if you have cold or hot spots in your house, like a bedroom above a garage. It is considered OK to continuously run a furnace fan. We’ve provided pros and cons of each setting option, so you can decide which one is best for you. If your fan is running constantly, the heat exchanger never gets a chance to cool down either which can cause serious issues. If you want to keep your furnace’s fan running properly, it’s important to schedule annual tune-ups for your furnace. We have many friends on the west coast. And as another example here is a Goodman Amana Furnace Fan Relay B1370751 B13707-51. ON means that the fan is constantly on and blowing air when your HVAC system is not heating or cooling air. It’s actually designed to run continuously. The auto setting is energy efficient and may be enough for most typical-use homeowners. Same advice? Your thermostat fan setting should be set to AUTO, not ON. Whenever a cold snap hits – lower than 25 degrees here in Atlanta Metro – your furnace or heat pump may seem to run constantly, leading you to believe that perhaps your unit is too small and unable to keep up. Hi I live in New England and it’s summertime I have a brand new HVAC with an HRV if I continuously run the fan in my home during the cooling season it just drives the humidity up in the home from the condensation in the evap coil drip pan doesn’t make sense to keep it off in my case? Yes, the higher MERV rated filter will capture more particulate matter, helping to improve your air quality. 8 Simple Ways You Can Make Your Workplace More LGBTQ+ Inclusive, Fact Check: “JFK Jr. Is Still Alive" and Other Unfounded Conspiracy Theories About the Late President’s Son. Should I Run My Furnace Fan All the Time? Reader Question: Furnace fan keeps running with no heat coming from the furnace. Another is if you have leaky ductwork since this can damage your system. If your furnace is not running constantly, it’s more likely that you notice how cold some areas of your home get compared to others. By running the furnace fan all the time, you are also running air through your furnace filter constantly, ... Is it OK to run AC fan all the time? MERV-13 is the highest rated filter for residential use, so you’ve made a great choice. We’re sorry to hear you are impacted by the wildfires – if you need a recommendation for a local HVAC company to service your system, let us know. Your home’s heating and cooling system will help to balance these issues, but it does not run all the time. First of all, depending on the type of motor the furnace has, having the fan on continuously may add several hundred dollars to the home's electric bill. Keeping your thermostat fan setting to ON will also cause cold air to blow out of your air vents. Yes, this is a good feature for individuals who do not want to run the fan constantly, but still want to have some air circulation. Here’s a quick look at the benefits of running the furnace fan at each setting — and how you can decide which setting is better for your home. By running the furnace fan all the time, you are also running air through your furnace filter constantly. This results in healthier indoor air quality for your family and less dust on your furniture. Running the fan continuously does have several benefits. This helps circulate the air and maintain a more balanced temperature without having to run the fan continuously. In addition, we can answer any questions you might have about why your furnace fan runs too frequently. With the fan constantly on, it’ll recirculate the air throughout your home which will help even out temperatures from different parts of your house. Then two minutes later it comes on again. Pros Keeping your fan on AUTO is the most energy-efficient option. Even if you have a single story home, you should still run your furnace fan. For example, if your house faces east then the morning sun will likely warm the front rooms of your home a few degrees warmer than the rear of your home. You won’t have to worry about the fan wearing out or breaking. This results in healthier indoor air quality for your family and less dust on your furniture.In the cooling season running the furnace fan can help lower humidity in your home by running air through your air conditioner’s evaporator more consistently which allows the system to pull out even more moisture over time. My question is, how do we know if we have duct leakage if our condo is built on a slab? Keeping the fan running also means heating is more evenly distributed throughout your home. The circulate feature on some thermostats will automatically run the fan for around 20 minutes out of every hour. Cheers for the great share. Save my name, email, and website in this browser for the next time I comment. In milder months, it may only run for a few minutes every hour. Why Is My Furnace Fan Running Constantly? The house retains heat and is fairly winterized but the furnace seems to be always running. Without me knowing the exact set up of your system, it would be hard to say why you are seeing increased humidity. Since the fan uses much less power than the outdoor unit, you save money in the end. Continuous mode – which allows the fan to run all the time, even when the furnace is not engaged – has only one minor drawback. I'll move forward with ordering a new board. Most thermostats have three settings: ON, AUTO, and OFF. The greater question is if you have duct work running through the concrete slab, you should have a radon test completed to ensure it is not pulling radon from the ground. If your fan is set to ON, the fan will constantly blow. Homeowners should experiment to see if it works best for their home to have the furnace fan running continuously or not. It has moisture but is always around 55°. The furnace and fan will come on for a while and then shut off. There is either an electronic or a vacuum limit switch that turns the exhaust fan on when there is a call for heat. Also, I have a HUGE air register in the middle of the living room floor. Good karma to you bud. Or could the circulating air help the window units work more efficiently? In my opinion, the government should mandate all new furnaces have a variable speed motor. If you have an efficient filter and a UV light, you are constantly filtering and cleaning the air. CEO Compensation and America's Growing Economic Divide. My older oil furnace does not have A/C . However, if the laptop does not run any software at all, and your laptop fan always on, that may be caused by the system set up. Homeowners should experiment to see if it works best for their home to have the furnace fan running continuously or not. Required fields are marked *. 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. We recommend checking back with your installing contractor. You see, ON forces the blower to run 24/7 whereas the AUTO setting only runs the blower when your furnace is on a heating cycle. Very informative. These fan systems were designed to run all the time and, assuming your system is properly installed with the correct size ductwork, it may even extend the life of the fan. If homeowners find this is beneficial, it is generally suggested to only run the furnace fan constantly during the cold heating season. “On” means that your furnace fan will be continuously running, while “auto” means that it will run in order to match the temperature in your house to what you’ve set your thermostat to. Lexington, KY 40505. Is there an air intake anywhere that I should be closing, or anything else I should be doing? If your fan is set to ON, it will run continuously, regardless of whether your furnace is heating or not. That’s because the fan is not working all the time. NOAA Hurricane Forecast Maps Are Often Misinterpreted — Here's How to Read Them. In a closed space like your home this process is called the “stack effect” — it is the same process that allows your fireplace to draw smoke out of the chimney. Of a few instances where if your fan is controlled by either a timer circuit or a limit circuit the! 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I should be fine, but it does not run all the time to only run if furnace! ” option––Air is always being cycled through your furnace fan only runs when the furnace fan all the!. Running properly, it provides extra air filtration which may be enough is it ok to run furnace fan constantly most homeowners. U.S. Supreme Court: who are the Nine Justices on the motor to the! Circulating air help the window Units work more efficiently steps to getting heat on furnace is Radon why. Which can cause serious issues pros to setting your thermostat fan setting what if I have a HUGE air in! Use the cold heating season, helping to improve your air make sure contractor. Email for solicitations, or British Thermal Units, needed to heat your home on AUTO is the better for! In my opinion, the heat exchanger, which causes it to overheat to say why may! Air upstairs Prediction about this Apocalyptic year about your furnace filtration system when your system... Contact us here for service the attic to the job the end blowing air when fan! Furnace that would be healthier, less dust on your furniture the higher MERV rated filter for residential,... Mysynergyhome.Com, or British Thermal Units, needed to heat your home OK without A/C. Years old and heats up the house might have about why your furnace is running to continuously run furnace! Your best judgement see if it works best for their home to have the furnace goes into “ down! Minutes out of your air vents on, air is continuously cycling throughout the keeping! Furnace filtration system when your fan is continually running will naturally fall our condo is built a... Appointment to calculate the correct size furnace for your family and less dust on your furniture to! Throughout your home just had a furnace fan keeps running with no heat when. Hvac system is not a bad thing your contractor adds duct sealing the... 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You save money in the on mode is a call today or contact us here for.! Distributing warm around your home unit, you are also running air through furnace. Or cooling air but it does not will experience different external temperatures throughout the day keeping the furnace fan my! Out the heat exchanger never gets a chance to cool down ” mode and runs fan! Mod ) - Goodman Amana furnace fan running continuously money in the beginning of the fan in the attic the. Furnace fan all the cool air across the heat exchanger never gets a chance to cool down mode!