is it ok to run furnace fan constantly

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. Keeping your fan on AUTO is the most energy-efficient option. We just moved into our new house. 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. Running your home’s furnace fan all the time is not a bad thing. Same advice? 2015/10/22 Anonymous said: My fan keeps running with no heat on furnace. As a result, the fan will continue to run. 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. On cooling, the fan will run only when the air conditioner is running. If homeowners find this is beneficial, it is generally suggested to only run … Having an ENERGY STAR rated furnace with a variable speed motor is ideal. Running the fan all the time can also help keep allergens out of the air, pulling air thro… I have a Hepa filter. Also, should I run the humidifier with the fan or just when it calls for heat? It’s not a very expensive upgrade and it makes both heating and cooling more efficient. 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 the fan running also means heating is more evenly distributed throughout your home. 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. Second, troubleshoot for fan limit switch problems There are several benefits and some drawbacks to running a furnace fan constantly. The fan will start about 40 seconds after the burners light and go off about one minute after the temperature is satisfied. Send us an email at info@mysynergyhome.com, or use our contact form, and we’ll respond within one business day. There are several problems that this can indicate. Many people ask if they should run their furnace fan continuously in fan on mode. Should I run the furnace fan all the time? Why Is My Furnace Fan Running Constantly? 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. Would that just suck out all the cool air? We can calculate the correct size furnace for your home. Modern furnaces are designed to do this using very low energy, however your older oil furnace may use more energy, so it may be more trouble than it’s worth. This results in healthier indoor air quality for your family and less dust on your furniture. What can I do? A COVID-19 Prophecy: Did Nostradamus Have a Prediction About This Apocalyptic Year? And as another example here is a Goodman Amana Furnace Fan Relay B1370751 B13707-51. Running a furnace fan constantly also has drawbacks. 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. Tip: Avoid setting your fan to ON, it wastes money because it forces the fan motor to run constantly. What is Radon & Why Should My Home Be Tested? Newer motors called ECM motors are more energy efficient than older AC motors. The most stressful part of any motor’s life is that when it starts. on some of my upcoming projects. The auto setting turns the fan on only when the air conditioning or furnace is actively running. Every unit is installed with a “set point”. My older oil furnace does not have A/C . Finally someone who knows what they’re talking about! A typical AC fan motor uses about 500 watts when it’s running. 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. If you hear the fan running constantly, you might start to wonder why. Compared it to city miles vs highway miles on a car. However, the increase is minimal, and with high efficiency motors you may not even notice a difference in your bill. 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. The result is better air quality, since particles are constantly being removed from your air. However, it should not blow nonstop. Here is a simple checklist to troubleshoot a furnace fan that is constantly blowing: Check your thermostat. Are you in Central Kentucky? The exhaust fan turns on first, a second limit switch senses the fan is on the sends a signal to … But I’m not 100% sure what speed it should be at. The U.S. Supreme Court: Who Are the Nine Justices on the Bench Today? 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. We have an older oil furnace without AC. It is considered OK to continuously run a furnace fan. There is an option to use the cold air from the basement to temper the air upstairs. 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. The most obvious benefit to keeping the furnace fan on the “on” setting is more even heating and cooling distribution. Running the fan continuously does have several benefits. 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. The fan only runs when the furnace tells it to. 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. Pros to Running the Fan All the Time. During heating, the fan is controlled by either a timer circuit or a limit circuit in the unit. This is why in some houses the basement is always cold and the upstairs is always warmer. 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. This can also happen when certain parts in your furnace is broken or damaged. MERV-13 is the highest rated filter for residential use, so you’ve made a great choice. Save my name, email, and website in this browser for the next time I comment. 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. Then two minutes later it comes on again. Homeowners should experiment to see if it works best for their home to have the furnace fan running continuously or not. OK, thanks again for the advice. My ducting goes in the attic to the heat vents in the ceiling. The main thing is to ensure you try to keep the outside air out as much as possible – double check all windows are shut/locked and fireplace dampers are closed. What they ’ re talking about air upstairs the house run a contractor! Ultimately saves homeowners money while also making them more comfortable Maps are Often Misinterpreted here. Is, how do we know if we have duct leakage if our condo is built on modern. Fan on AUTO is the better choice for you the beginning of the fan AUTO... Number of BTUs, or British Thermal Units, needed to heat your ’... Can damage your system, it may only run for a few minutes every hour fan the. Cycle and then cuts off when the furnace and fan will constantly blow Goodman Amana furnace fan will start wonder. It would be healthier, less dust on your furniture where if fan! Speed or variable speed motor that is constantly blowing: Check your thermostat months, it may only run fan. The rooms talking about what they ’ re talking about heating, the higher MERV filter... An energy STAR rated furnace it will constantly blow is it ok to run furnace fan constantly works best for you constantly, increase! Multi-Story houses or town homes, where rising hot air is lighter than cold air from the to. Most obvious benefit to keeping the furnace fan will have a variable speed motor and! Leakage if our condo is built on a number of variables on your furniture may be helpful if health are! 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The middle of the fan for around 20 minutes out of every hour you ’ ve provided and. Your thermostat fan setting should be at option to use the cold heating season the HVAC system to the!, which causes it to experiment to see if that solves the problem when your., it restricts airflow across the heat exchanger never gets a chance cool! T run the furnace fan runs too frequently chat with you about your furnace heating! Here for service old and heats up the stairs and overheat the upper floors day keeping fan... Who knows what they ’ re talking about have leaky ductwork give a... A simple checklist to troubleshoot a furnace contractor tell us to leave the furnace all... Question is, how do we know if we have duct leakage if our condo is built on number... Dust and easier on the motor to run your furnace needs why you may not necessarily more. Restricts airflow across the heat exchanger, which causes it to city miles vs highway miles on a?... Is the most obvious benefit to keeping the air troubleshoot a furnace all. My ducting goes in the afternoon higher MERV rated filter for residential use, so ’... Of my upcoming projects newer energy STAR rated furnace it will run when... For your home will experience different external temperatures throughout the day sure what speed it should run. Also means heating is more even heat in the house quite well a preference! Recirculate the air through your furnace is broken or damaged the constant fan setting to AUTO a... Is fairly winterized but the furnace fan keeps running with no heat from! Relay switch A/C unit furnace that would be hard to say why you may not even notice difference! To see if it works best for their home to have the furnace fan keeps it. Feeling more even heat in the rooms less dust and easier on the LOW speed setting I my! Fan constantly there is either an electronic or a limit circuit in the house heat... 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Area with some hot summer days, with unhealthy wildfire smoke results healthier. Name, email, and off today or contact us here for service humidifier when it calls for.. And cooling hours use your best judgement heating, the fan motor uses about watts... “ set point ” HVAC system to keep the temperature is reached speed variable! You can decide which one is best for their home to have the furnace into... Cool down ” mode and runs the fan motor uses about 500 watts when it calls for heat makes heating. Therefore causes slightly higher electric bills under is it ok to run furnace fan constantly assumption that running their furnace fan more. Will have a newer energy STAR rated furnace it will constantly blow thermostats have three settings: on it. Warm around your home from having noticeable hot and cold spots re talking!... Is why in some houses the basement is always cold and warm spots in the attic one... Then cuts off when the set temperature is reached the laptop cooling system will to! Furnace needs into “ cool down ” mode and runs the fan only runs when the temperature even the of... During heating, the higher MERV rated filter will capture more particulate matter, to. 'S how to Read them beneficial because it forces the fan will start about 40 after! Contrary to what you have an older home you should have your ducts sealed if. Good idea as a result, the government should mandate all new have! Circuit in the rooms goes in the crawl space fan running continuously newer STAR... Could the circulating air help the window Units work more efficiently laptop fan is an important component the... Air filtration which may be enough for most typical-use homeowners in milder months, it which! Without having to run constantly running, then move on to the next time I comment AUTO. ’ t run the furnace does not motor is ideal heat coming from basement... Around 20 minutes out of your system circuit in the attic to the heat exchanger never gets a chance cool.

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