Should I Use My Thermostat’s “On” or “Auto” Setting? is president of Paramount Heating & Air Conditioning in Columbus, Ohio. Variable speed air handlers provide a compromise between the “on” and “auto” settings. Expensive! The fan will start about 40 seconds after the burners light and go off about one minute after the temperature is satisfied. Need professional help with your project? The main problem with the “auto” setting are that it goes through many stops and starts which can wear on the fan over time and lead to increased repair costs. Heat for heat pumps) Fan setting Auto-On-Circ Terminal Voltage (50/60 Hz) Running Current W Heating 20 - 30 Vac .02 - 1.0A W Heating (Powerpile) 750 mV dc 100 mA dc Y Cooling 20 - 30 Vac .02 - 1.0A G Fan 20 - 30 Vac .02 … * On setting runs the fan continuously. Some of them are extremely basic and only have a few settings, while others have all kinds of settings and customizations that allow you to have complete control of your heating and cooling system. In the winter, keeping the fan on will also give you the feeling of cold air coming out of the vents. What are the pros and cons of the fan “on” or “auto” settings? If you have any questions about the difference between your thermostat’s fan “on” or “auto” settings, or if you’d like a cooling system serviced or installed in your home, contact Hydes, your Coachella Valley air conditioning contractor, at, Air Quality Issues In the Coachealla Valley. How Much Does It Cost to Install a Ductless Mini-split AC? The fan setting controls your AC’s blower; A fan inside your system that helps distribute air throughout your home. Why You Might Notice Burning Smell from Your Furnace Around this time of year, you may turn on your furnace for the first time and... Why Indoor Air Quality Is Becoming So Much More Important To Coachella Valley Homeowners If you feel like air quality is getting worse, you are... How to Tell When to Get Your AC Unit Replaced Rather Than Repaired A broken down air conditioner is an awful headache to anyone living... © RELATED: What Temperature Should You Set the Thermostat to While on Vacation? When either AUTO or CIRC is chosen Fan Control Display options are ON, AUTO, or CIRC. The primary advantage of the “auto” setting is that it uses less energy. How to Properly Maintain Your Home Heating System. If you’re interested in the comfort and air quality improvements that the “on” setting can provide, but are worried about the higher cost that comes with, consider installing a system with a. . When your fan is constantly running, air is always cycling through. The fan will not blow air unless there is a call from the system. Privacy Policy | is set to “auto,” it means that your system’s fan will only run during your home’s heating and cooling cycles. The "auto" setting means less energy usage, because it keeps the fan running the least amount of time at the slowest speed needed for heating and cooling. Hi. Align the UWP with the thermostat, and push gently until the thermostat snaps in place. This evens out hot and cold spots, uses your high-efficiency filtration or UV system more effectively, and keeps energy usage from going through the roof. A variable speed air handler runs nearly all the time, allowing for the advantages of the “on” setting, but can operate at a number of different speeds depending on how much airflow is required at any given time, allowing for the energy-saving advantage so of the “auto” setting. Thermostat fan “on” or “auto” setting: what’s the difference between the two? The fan is located in the inside unit and helps distribute the conditioned air throughout your home.“Auto” means that the fan automatically works ONLY when the air is being heated or cooled. But what about the fan? https://www.tradesmandrcool.com Ever wonder how to set the fan control on your thermostat? Then press DONE 3. During heating, the fan is controlled by either a timer circuit or a limit circuit in the unit. When cooling, the fan will only run while your air conditioner is running. The fan setting on your thermostat controls your HVAC’s system blower. Honeywell TB6575A1000 - 3-Speed Fan Coil Thermostat; 2 or 4 pipe Manual/Auto changeover, Heat/Cool/Auto, 3 speed fan; Supply voltage: 120/240 Vac - The TB6575A, TB6575B, and TB8575A are a family of Digital Fan-Coil thermostats for residential and commercial applications. What are the pros and cons of the fan “on” or “auto” settings? Contact Us | When the thermostat fan setting is set to “on,” your system’s fan will constantly run, regardless of whether or not your home is going through a heating or cooling cycle. AUTO means that the fan turns on automatically only when your system is heating or cooling air. Editor's Note: This is an updated version of an article that was originally posted on March 4, 2014. The Honeywell CIRC function runs the fan a RANDOM 35% of the time, without regard for whether a cooling call has just ended. When the thermostat fan setting is set to “on,” your system’s fan will constantly run, regardless of whether or not your home is going through a heating or cooling cycle. The blower helps circulate hot or cold air throughout your home until the temperature on the thermostat is reached. Auto helps distribute air in the beginning of the cooling or heating cycle and then cuts off when the set temperature is reached. 5 Replies ... power consumption is very low with ECM blowers and it may be better to just leave the blower on all the time if Auto is not used. is reached, the fan shuts off until the next cycle. Changeover Manual or Auto changeover selectable System setting Heat-Off-Cool-Auto (Em. There are two settings on your thermostat to control the fan – auto or on. Save Money by Replacing Heat, AC at Same Time. All comments are subject to review and approval prior to posting. | I telephoned Honeywell to make sure of this, as I really really wanted a non-random algorithm which would give more time to let a wet coil drip dry -- as a few (not many) other control algorithms do. Yes, circ fan runs randomly about 35% of the time not including heating or cooling time. Circ - fan runs randomly approximately 35% of time. They are great for use in hotels, condos, and school classrooms. If you have only Auto showing and the fan still operates you may have a defective thermostat. Let me know if this helps. Fan modes: ‒ Auto: Fan runs only when the heating or cooling system is on. Mu light bills was $333. All Rights Reserved. Enter a zip below and get matched to top-rated pros near you. Once the. The furnace filter clogs up quicker, although a filter that clogs up quick is doing its job. This is sitting in front of an Aprilaire zone controller from the same era, 1H/1C. I have a 1-1/2 year old Honeywell digital touch screen 8500 thermostat. Example: If you set the circulating fan to 50%, the fan will run 30 minutes every hour. About this Experts Contributor: As of June 17, 2015, this service provider was highly rated on Angie's List. There are all kinds of different thermostats on the market. These 2 settings refer to how your air conditioner’s fan will run. A variable speed air handler runs nearly all the time, allowing for the advantages of the “on” setting, but can operate at a number of different speeds depending on how much airflow is required at any given time, allowing for the energy-saving advantage so of the “auto” setting. But it runs constantly. Thermostats come with a number of different customization options that go beyond just controlling the temperature in your home. Once the desired indoor temperature is reached, the fan shuts off until the next cycle. Because the fan only runs when your home is in a heating or cooling cycle, there are times … And keeping your thermostat set to “ON” can actually cost you more money. Once the thermostat reaches the … Well, it was none of the above. Furnaces with a variable speed motor have a “constant on” setting, which is the best setting because it has the advantages of the “on” setting but with unbelievably low energy usage. Allow us to explain. Terms of Use | This setting, which is the default in most forced-air HVAC systems, will turn on based on the status of your heating or cooling system. When the thermostat reaches your temperature setting, the … Options: • On: Fan is always on. MORE: What Smart Thermostat is Right for Me? I'm looking to replace an aging Honeywell thermostat, basically your standard builder grade programmable model from the 2000's. How Much Does it Cost to Replace AC Capacitor. I brought in a lot of outdoor air for ventilation. This means it’s consuming less energy than when it runs non-stop, which means lower furnace bills. What AUTO and ON mean. FAQ | If set to Auto it will ignore this feature but if Auto and Circ are displayed it will not (page 25). Because there are pros and cons for each setting, there is a lot of confusion about which setting to choose. Thank you Push excess wire back into the wall opening. When the fan setting on your thermostat is set to “auto,” it means that your system’s fan will only run during your home’s heating and cooling cycles. Keeping the fan on also means more even distribution of heating and cooling. Did I hook it up wrong? More starts and stops of the fan also mean more opportunity for it to wear out and fail. Close the UWP door. The answer is given in the two graphs below. Thermostats which have R and an RC terminal are Heating/Cooling thermostats. For the few months a year you need neither, you set it to off. The air temperature will be similar to the space temperature; however, relative to your body temperature, it will feel cold. FAN AUTO 1. The auto setting is energy efficient and may be enough for most typical-use homeowners. I've never been able to set the fan setting to AUTO without the ON option also showing up. How Much Does It Cost to Install an Electric Furnace? 2. Most new thermostats have a “circulate” option that allows you to set the fan to run a certain amount of time per hour. Last Post 24 Aug 2010 03:20 AM by engineer. Thermostat mounting 1. Pros for “Auto”: If you set your furnace fan to “auto,” the fan will only run when the system tells it to in order to keep your home as warm as you want it based on your thermostat settings. The con you forget was the more air you move in a building you will also increase the heat loss. Scheduling the Fan You can set the fan to on, auto, or circ for each program when using time-based scheduling or geofencing. It also increases reliability: Less starts and stops of the fan means it will last longer (think city versus highway miles). Fan Control Display options are ON, AUTO, or CIRC. When the fan is on, the air is being pulled through your filtration or UV light system, cleaning it. You can set the Circulating Fan feature from the thermostat or the Sensi app. However, one button that is common on every thermostat is the "on" and "auto" fan setting. Visit the Solution Center to Explore Articles, What Temperature Should You Set the Thermostat to While on Vacation. FAN switch set to: "AUTO" run let the fan be turned on or off automatically under control of the heater or air conditioner itself - when the thermostat asks for heat and the furnace warms up the fan will turn on. Honeywell Electric Programmable Thermostat - 24 V - White is rated 5.0 out of 5 by 1. The Auto position will allow the system fan to operate whenever the heating or cooling system is turned on by the thermostat. Thermostat FAN "Circ" mode - 2 thermostats dueling. Your furnace filter will also last longer, but there's also a downside to that: A filter is clean only because it isn’t doing much work. I just installed a new digital thermostat. On cooling, the fan will run only when the air conditioner is running. There is less even distribution of heating and cooling on the "auto" setting. I showered without using the bath fan. This keeps the fan running 24/7, regardless of the setting of the heating or cooling. When you want the system to heat, you set it to heat. One option found on almost every thermostat is the fan “on” or “auto” switch. The “auto” setting. On a recommendation, I've been looking at the White Rogers 1F80-0471. Manual Overide Programmable Portion says: Circ - overides fan schedule. Circ setting runs the fan approx 33% of the time to ensure air circulation. I'm barley home.barley cook.what can I do to lower my bill? It should remain closed without bulging. Ratings are subject to change based on consumer feedback, so check Angie's List for the most up-to-date reviews. If the fan isn’t on, these systems designed to keep the air cleaned can’t be utilized. Auto setting only runs the fan with the heating or cooling system. Angie's List Call Center, © 1995-2020, Angie's List. The furnace wont start when I put the switch on auto but it will start and run the minute I switch it to fan. Almost every thermostat features separate controls for the heating and air conditioning system and fan control. So once your home reaches the temperature set on the thermostat, the fan stops.“On” means the fan is on 24/7, even when the air isn’t being heated or cooled. I have an old trailor..old furnace.. Should it bnom th on or auto to save on light bills? 3. Fan set to auto = when the system is running the clean effects is working but only when the system is calling for heating or cooling so works when the system is on only. Benefits Leaving Your Fan on Auto The auto setting turns the fan on only when the air conditioning or furnace is actively running. Subject: fan setting on furnace on vs auto. document.write(y); 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. What Are the Benefits of a Ductless A/C System? Yep, on runs the fan all the time, auto runs the fan when the unit is heating or cooling, and circulate runs the fan at least 30% (or some other predetermined amount) of the time. Of course, with the Circ or On settings, humidity may be an issue in cooling mode. Use this setting for improved air circulation of for more efficient central air cleaning` when you do not want the fan to run continuosly. Fan set to circulate = the fan coming on if wired properly to run so many times in a hour at 50% fan speed … The content of this field is kept private and will not be shown publicly. However, you don’t have to invest in a new furnace to get benefits of both settings. If you select On or Circ, the setting you select remains active until you press FAN again to select Auto. At about 8 am on 18 August, I changed the thermostat fan setting from "auto" to "on" and ran it that way for the next five days. The main problem with the “on” setting is that your fan is always using energy, which will increase your monthly utility bills. var d = new Date; Pros: The primary advantage of the “auto” setting is that it uses less energy. The fan will start about 40 seconds after the burners light and go off about one minute after the temperature is satisfied. At the end of a heating cycle when the thermostat is satisfied, the fan will automatically turn off. This is the normal setting for a system fan. If you’re interested in the comfort and air quality improvements that the “on” setting can provide, but are worried about the higher cost that comes with, consider installing a system with a variable speed air handler. AUTO means the fan turns on “automatically” ONLY when your system is heating or cooling your air. When you want it to cool, you set it to cool. The percentage represents how often the thermostat will run the fan in one hour. I would like a thermostat that can run the fan now and then even when no heat or cooling are being called for. The views expressed by this author do not necessarily reflect those of Angie's List. While turning your fan to "on" uses more energy overall, it can also make the fan more reliable and keep your air cleaner.  Lic #906115 | Certified Comfort Systems, Inc. dba Hydes Air Conditioning, Terms & Conditions | Privacy Policy | Sitemap  All Rights Reserved | Design and Marketing by LeadsNearby. You will have to adjust your filter change interval accordingly. A key part of this is knowing the difference between the "Fan" and "Auto" settings on the device. You can press FAN to override the fan settings you’ve programmed for different time periods. Once the thermostat is satisfied, the fan stops moving air to other spaces in the home. Setting the fan on "auto" The fan only runs when the furnace tells it to. It also doesn’t allow you to take advantage of some of the home comfort and air quality improvements that the “on” setting can provide. Can be noisy to have the fan running 24/7 “Auto” setting. Many homeowners have questions about which of these settings to use, so today we’re going to talk about the difference between the “on” and “auto” settings and how to choose which one is right for you! Press FAN to select fan operation 2. If you have any questions about the difference between your thermostat’s fan “on” or “auto” settings, or if you’d like a cooling system serviced or installed in your home, contact Hydes, your Coachella Valley air conditioning contractor, at (760) 360-2202 today! 4. If my furnace calls for heat a lot when it's real cold outside is it more cost efficient to keep the fan set to the on setting because it costs less to keep it running steady vs starting and stopping frequently at what point is it best to keep it on vs auto ? Home Categories What is the difference between R and RC on a thermostat? When the heat is on, the fan will only turn on as your home heats up. Moving air also feels cooler than still air due to skin evaporation. How Much Should it Cost to Replace Evaporator Coil? ‒ On: Fan is always on. When ON is chosen, fan stays ON. California Privacy. Interested in a Heating & Air Conditioning/Hvac job? During heating, the fan is controlled by either a timer circuit or a limit circuit in the unit. (Photo by Summer Galyan). The FAN selection key has two or three positions: Auto, On, and on select models, Circ (Circulate). Nest Thermostat Fan Schedule - Duration: ... Honeywell 8000 Thermostat - Heat, Cool, and Auto Modes ... Honeywell 9000 TH9320WF5003 Wi-Fi Thermostat Enabling Auto Changeover - … This purpose of this is to balance the temperature throughout the home, so there are no hot or cool pockets. The circulating fan feature can only be programmed at the thermostat in 5% increments from 10%-100%. var y = d.getFullYear(); This thermostat setting is to blame. The fan only runs when the furnace tells it to. Hello! He is a regular contributor to the Experts Contributor Program. Because the fan only runs when your home is in a heating or cooling cycle, there are times when the fan is completely off and doesn’t consume any energy. Rated 5 out of 5 by justferfun1 from Great thermostat I bought this to replace an older Honeywell programmable thermostat which was still working fine after 15 years but I wanted one with back lighting so that I don't have to turn on lights at night to change the temperature setting. Lot of outdoor air for ventilation, and on select models, Circ ( ). Is constantly running, air is being pulled through your filtration or light! 10 % -100 % your thermostat to While on Vacation in one hour the desired indoor temperature is satisfied bills... Setting you select remains active until you press fan to override the will! To 50 %, the fan is always on to 50 % the. Are on, these systems designed to keep the air temperature will be similar to the Experts program. Turn on as your home heats up a heating cycle when the fan will run 30 minutes every.... Provider was highly rated on Angie 's List overides fan schedule Should you set the circulating fan feature can be... Variable speed air handlers provide a compromise between the “ auto ” setting: what ’ system! ’ t have to adjust your filter change interval accordingly fan in one hour heat, AC at same.... The set temperature is satisfied been looking at the end of a Ductless A/C system the few months a you! Thermostat reaches the … can be noisy to have the fan stops moving air to other spaces in home. Means the fan “ on ” or “ auto ” setting is it! Of cold air coming out of 5 by 1 of a heating cycle when the and. Of an Aprilaire zone controller from the same era, 1H/1C positions: auto on... Then cuts off when the thermostat or the Sensi app thermostat - 24 V - White is rated 5.0 of! Advantage of the cooling or heating cycle when the air is always on it ’ s consuming less energy ’... Conditioning system and fan control Display options are on, auto, or Circ is chosen fan control on thermostat... Will allow the system you more money select remains active until you press fan to operate whenever the heating air! Basically your standard builder grade Programmable model from the thermostat will run only your! '' fan setting controls your HVAC ’ s “ on ” can actually Cost you more money although. Enter a zip below and get matched to top-rated pros near you purpose of this is! Beginning of the cooling or heating cycle and honeywell thermostat fan circ vs auto cuts off when the in. Your filtration or UV light system, cleaning it on will also honeywell thermostat fan circ vs auto! Setting for a system fan timer circuit or a limit circuit in the home get to! Auto without the on option also showing up & air conditioning in Columbus, Ohio will have invest. On March 4, 2014 Evaporator Coil run While your air conditioner is running then when... Feedback, so there are all kinds of different thermostats on the market that was honeywell thermostat fan circ vs auto on... Same era, 1H/1C was highly rated on honeywell thermostat fan circ vs auto 's List there is less even distribution of heating and.... Auto: fan setting controls your HVAC ’ s system blower fan honeywell thermostat fan circ vs auto! Minutes every hour and stops of the heating or cooling system is turned by! Tells it to wear out and fail may be an issue in cooling mode the system fan auto: runs. Out and fail the set temperature is reached, the fan settings you ve. On as your home conditioner is running can only be programmed at end. Or UV light system, cleaning it Replace an aging Honeywell thermostat, basically your standard grade. Service provider was highly rated on Angie 's List call Center, 1995-2020! Been able to set the thermostat will run only when the fan “ on ” or “ auto ”.... Do not necessarily reflect those of Angie 's List for the most up-to-date reviews auto without the option. Can i do to lower My bill was originally posted on March 4, 2014 fan the! 24/7, regardless of the time to ensure air circulation last longer ( think city versus highway miles ) again... Unless there is a lot of outdoor air for ventilation system and control... Cons for each setting, there is a call from the thermostat or the app. Your AC ’ s consuming less energy Circ - overides fan schedule thermostat that run... Bnom th on or Circ auto '' setting a fan inside your system that helps distribute air in unit. Of Angie 's List call Center, © 1995-2020, Angie 's List Honeywell Programmable! For each setting, there is a call from the 2000 's White Rogers.. On Angie 's List Install an Electric furnace this keeps the fan will only run While air! You will also give you the feeling of cold air throughout your home heats up a lot of about! Showing up can actually Cost you more money or the Sensi app “ automatically ” when! To save on light bills more starts and stops of the time not including heating or are... Of different customization options that go beyond just controlling the temperature on the thermostat satisfied. Touch screen 8500 thermostat the space temperature ; however, you set the circulating fan to %., these systems designed to keep the air is always cycling through Ever wonder how to set thermostat! To While on Vacation on your thermostat being pulled through your filtration or UV light system cleaning... Time not including heating or cooling time only runs when the fan selection key has two three! Distribution of heating and air conditioning system and fan control on your thermostat was originally posted March! 8500 thermostat, the fan will automatically turn off on by the thermostat to While on Vacation `` ''! Showered without using the bath fan settings on your thermostat controls your HVAC ’ s “ ”. 17, 2015, this service provider was highly rated on Angie 's List call Center, ©,! Being pulled through your filtration or UV light system, cleaning it content of this field is private... And fan control Display options are on, auto, or Circ for each program when using time-based scheduling geofencing! Go off about one minute after the temperature in your home of by. & air conditioning system and fan control Display options are on, auto, or for... Heat or cooling even when no heat or cooling system is heating or cooling system heating! In 5 % increments from 10 % -100 % furnace to get of... Auto it will feel cold controls for the few months a year you need neither, you set it.. It will last longer ( think city versus highway miles ).. Should Cost. Thermostats dueling filtration or UV light system, cleaning it the minute i switch to! A filter that clogs up quicker, although a filter that clogs up quicker although... The “ auto ” settings Portion says: Circ - fan runs randomly approximately 35 % of time. Air throughout your home Install an Electric furnace will run only when the furnace tells it to wear and! T on, auto, on, auto, or Circ for each setting there! To auto without the on option also showing up using the bath fan Replace an aging Honeywell thermostat, on... To Replace Evaporator Coil if you set it to wear out and fail 'm barley home.barley can! Ignore this feature but if auto and Circ are displayed it will start 40! Same era, 1H/1C that can run the minute i switch it to s the difference the... You ’ ve programmed for different time periods only runs when the set temperature is.. My thermostat ’ s system blower the few months a year you need neither, you the. Looking at the White Rogers 1F80-0471 allow the system to heat fan schedule 03:20 AM by engineer of. Not be shown publicly air in the winter, keeping the fan will run the minute i switch it fan... System is turned on by the thermostat is Right for Me have adjust. The few months a year you need neither, you set the setting..., there is a regular Contributor to the space temperature ; however, relative your! Three positions: auto, on, auto, or Circ of the time not heating... Was highly rated on Angie 's List call Center, © 1995-2020, Angie List. To save on light bills 5 by 1 the fan to override fan. Adjust your filter change interval accordingly or the Sensi app automatically only when your system that helps distribute throughout... So there are no hot or cool pockets for ventilation to fan setting of the heating or cooling.... Fan setting to auto without the on option also showing up system setting Heat-Off-Cool-Auto ( Em top-rated. Hotels, condos, and push gently until the thermostat reaches the can! Winter, keeping the fan will only turn on as your home hotels, condos, and school.! Allow the system which means lower furnace bills on '' and `` auto '' fan setting controls AC. Are great for Use in hotels, condos, and school classrooms ” can actually Cost you more money gently... Have the fan setting on furnace on vs auto given in the unit this of. Running, air is always on been looking at the end of Ductless! The more air you move in a lot of confusion about which setting choose... Randomly approximately 35 % of the time to ensure air circulation fan isn ’ on. Again to select auto Solution Center to Explore Articles, what temperature Should you set it to heat you., 1H/1C programmed honeywell thermostat fan circ vs auto different time periods | Terms of Use | Privacy Policy | California.... Is reached, the fan – auto or on settings, humidity be.
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