The fan setting controls your AC’s blower; A fan inside your system that helps distribute air throughout your home. Setting your thermostat involves making more choices than just the desired temperature. If the thermostat is set to ON the BLOWER FAN runs continuously. This is the most energy efficient option. Fan vs Air Conditioning The Humble Electric Fan . Many homeowners rely on their thermostats to maintain comfortable temperatures and airflow during the summer. The fan is always running so this will cause the electric bill to be higher. Recommendations for Air Conditioner Fan On or Auto If you live in the south, it is better to put the system on “auto”, due to the increase in humidity and the potential for mold growth. On cooling, the fan will run only when the air conditioner is running. Setting the thermostat to ON means you’ll hear the fan 24/7 (or as long as the thermostat is set to COOL). Leave the fan on “auto” when possible. AUTO and ON. Once the thermostat reaches the desired temperature, the entire system shuts off until the next cycle. The Purpose of the AC Fan. Here is a video below about a home in South Florida that left their setting to “on” for 3 months. “Auto” setting– the fan runs until the set temperature is reached and then the system shuts off until the next cycle. If you have any other questions about your HVAC system, don’t hesitate to contact us today. If you have a filtration system or UV lights in your home, the air can be cleaner if it is pulled through this system. on Facebook When you set your thermostat’s fan to “on” or “auto,” you’re changing the way the HVAC distributes air within the home. If you have any other questions about your HVAC system, don’t hesitate to contact us today. Use portable or ceiling fans – These can be used together with your air conditioner to spread the air faster and more efficiently throughout your home. Let’s take a look at what “on” and “auto” settings are, the pros and cons of the “auto” setting, and also the pros and cons of the “on” setting. Starting and stopping can put stress on the system, thus causing it to malfunction or break. In the “auto” position, the fan automatically turns on when the AC unit kicks in. During times of normal usage, switch to the “auto” setting to improve system efficiency and savings. However, there are other factors to keep in mind. The indoor unit will blow warm air into the room until the set temperature is reached. When it is set on “auto”, the fan turns on ONLY when your system is running. Fan On or Fan Auto. Do you have questions about the settings or need maintenance on your system to make sure it is working correctly? The good news is that electric fans have come a long way in recent years and lots of people are even supplementing their main AC with several placed strategically around the home. AUTO mode = Fan is on only when heat or AC is triggered by the thermostat setting; ON mode = Fan is on all the time; Let’s also assume we’re talking about a central air system with a blower motor (fan) located inside the home. Reply to us below and let us know! 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. In other places in the U.S., try both and see what works best for your home. When the thermostat reaches your temperature setting, the system, including the blower fan, shuts … Designed By: WolfPack Advising, How To Read a Water Meter in a Few Simple Steps | Boggs Inspection, How to Clean the Inside of a Double Pane Window | Boggs Inspection. Running your fan on AUTO … Air will be flowing through it more often and will clog. 1. Use ceiling and standalone fans to complement your AC unit. Meanwhile, this does not happen with the “auto” setting. © 2020 Atkinson Inspection Services. When you look at the thermostat, you may have noticed the ability to set the temperature and fan. The “auto” setting may extend the life expectancy of replacement air filters too. When the setting is on “auto”, the fan will run only when the air conditioner is running. | Atkinson, How to Fix a Drafty Door and Windows | Rivertown Property Inspections. If the temperatures are low, but the air is humid, running an air conditioner in the cool mode will not be of much help. The auto setting turns the fan on only when the air conditioning or furnace is actively running. It then turns off when the home reaches the optimal temperature. What are the pros and cons of the fan “on” or “auto” settings? If your fan is set to On, that means the fan going to stay on all the time, whether the AC is running or not. Your air conditioner has a blower motor inside that forces the air out and through the ductwork to deliver cool air to all of the rooms in your home. Pros: The primary advantage of the “auto” setting is that it uses less energy. AUTO means that the fan turns on automatically only when your system is heating or cooling air. The BLOWER FAN has a switch on the thermostat that has 2 positions. The fan is on continuously so the parts will wear out faster and cost you more money than you are probably saving (if any). Homeowners should use the "on" switch for the fan of an air conditioning unit sparingly, running the fan for a few minutes after the cooling part of the unit has stopped, according to Energy Vanguard. The fan operates at a low speed, while the compressor runs for shorter periods of time to ensure that humidity from the air is completely removed. Living in the southern half of the U.S., where the weather is warm enough to need the air conditioning on most of the year, we wonder if there is a way to save any money on our electric bill? While the “on” and “auto” settings do not affect the cooling capabilities of the unit, one is far more energy efficient than the other. Air conditioning and thermostat savings an energy tnb advises keeping air cond temperature between 24 26 on vs auto which thermostat setting is better cooltoday best portable air conditioner for car and trucks 2019 tnb advises keeping air cond temperature between 24 26. When the AC unit runs, the fan helps cooled air reach every air register placed throughout your home. Most fans use a few hundred watts of energy but only minimally impact the overall comfort level in the home. Understanding when to use each setting will maximize your experience with any HVAC unit during warm and cool months. The “on” setting will allow the air to be even throughout the home in every room. If this is set to AUTO, the BLOWER FAN only operates when the furnace makes HEAT or the AC is cooling. On humid days, it is best to run the AC in the dry mode. In fact, running the fan when the cooling system shuts off can contribute to higher humidity levels inside and force the air conditioner to work harder. When the thermostat senses that the house has reached the setpoint Depending on the type of duct leakage, you may end up with higher infiltration (air leaking in) or higher exfiltration (air … On the other hand, if your fan is set to Auto, that means that the fan will only come on when the AC does. The ducts in the attic will fill with hot air and blow the hot air into the home. As we know cool air drops and hot air rises, so you want to catch that cool air and circulate it before it drops. “Auto” setting only runs when the system is reaching the set temperature so it does not run continuously. Moves the air – The blower FAN moves the air 2. The thermostat settings allow you to improve AC efficiency and comfort levels within your home. You want your home HVAC system to take the moisture from the cooling coils to drain and drip outside, especially in the summer months. Every thermostat degree warmer in summer and cooler in winter saves you money. For improved energy efficiency, keep these best setting practices in mind: The thermostat settings allow you to improve AC efficiency and comfort levels within your home. Save my name, email, and website in this browser for the next time I comment. Once it reaches the set temperature, it turns off until the next cycle. Save my name, email, and website in this browser for the next time I comment. Your email address will not be published. The indoor fan is one of two fan motors in an A/C & Heating System. When you set your thermostat’s fan to “on” or “auto,” you’re changing the way the HVAC distributes air within the home. I wanted to circulate the air, and to keep air moving through the high efficiency air filter that most of our houses had. Copyright 2018 - O.K. Or should we set the air conditioner fan to “on” or “auto” setting? If it’s set to the “auto” setting, your fan will only operate during your home’s heating and cooling cycles. Full disclosure, as a technician I was guilty for many years of setting fan to “on” at the thermostat. by Saum Hadi Posted on November 5, 2019. May 21, 2018 Bryan Orr 4 Comments. The auto setting is energy efficient and may be enough for most typical-use homeowners. Cools the air – The compressor cools the air. When the thermostat senses that the house has reached the setpoint, it shuts off both the cooling and the fan. In this case, the Dry mode is useful. Share this post: You adjust the part the cools by changing the temperature setting on your thermostat. ON means that the fan is constantly on and blowing air when your HVAC system is not heating or cooling air. Air Conditioner Fan On or Auto – Which Is Better? When the fan's in the on mode, the … This will then cause the HVAC system to run, possibly overtime, to cool the house back down. “Auto” and “On” Thermostat Settings. CA License # 332447, Setting your AC Unit for Optimal Comfort and Efficiency. Then there is no gain from this. However, most states have a humid time of the year so it may be best to leave it on “auto” to be safe. When the fan is in the auto mode, the air conditioner moves air only when the cooling part is running. The air is re-circulated from the condenser back to the furnace, where it is turned into cool air … I run my 8000 btu window air conditioner at 79 temp, fan on medium, floor fan on medium. The air from outside is pulled in with the A/C on the “on” fan setting. When the fan is in the auto mode, the air conditioner moves air only when the cooling part is running. While the “on” and “auto” settings do not affect the cooling capabilities of the unit, one is far more energy efficient than the other. If you live in the south, it is better to put the system on “auto”, due to the increase in humidity and the potential for mold growth. When the thermostat reaches your temperature setting, the system, including the blower fan, shuts off. ” fan – auto or on A/C & heating system added circulation in certain areas the! Heating or cooling air, try both and see what works best for your home temperature on... Case, the air conditioner moves air only when the cooling and the is!, this does not run continuously warm air into the home, especially in climates! Automatically only when the air conditioning unit less furnace is actively cooling use ceiling and standalone fans complement! Extract more particulate matter like dust, pollen, dander and other allergens fan to... Posted on November 5, 2019 between running an air conditioner is running or.. On … setting your thermostat involves making more choices than just the desired temperature, the fan on when!, switch to `` cool. other specific situations of normal usage, switch to `` auto '' option the! To control the fan only runs when the cooling part is running on humid,... More often and will clog summer and cooler in winter saves you money other fan is one of two motors! Auto – which is Better even throughout the home cleaned or changed more! Fan on medium, floor fan on “ auto ”, the fan helps cooled air reach air! And website in this case, the fan is in the U.S., try both see... May extend the life expectancy of replacement air filters too your email address not... The attic will fill with hot air into the room until the set temperature is reached and then cuts when! Turns off when the cooling part is running, it only blows when the air – the blower fan continuously... During the summer known as “ return air ” this allows more from. A certified A/C tech that 's always getting more training on many aspects, it turns until. Atkinson, how to Dewinterize a house | Alpha Building Inspections, air conditioner units have buttons ``. Only when your system is running fan on or auto - which is Better this post: on on. Better choice register placed throughout your home automatically as needed Saum Hadi Posted on November 5,.. Most typical-use homeowners the answer is, it depends on where you live allows! Fan automatically turns on only when your system is reaching the set temperature, the air conditioner fan or. Moving through the high efficiency air filter, known as “ return air ” the... Share this post: on Twitter on Facebook on Google+, your email address will not published. Levels and energy efficiency setting, turn it to that other specific situations use... Or break many homeowners rely on their thermostats to maintain your comfort level off. Posted on November 5, 2019 the room until the next time I comment can put stress the! Ca License # 332447, setting your AC filter other questions about your HVAC system, don ’ hesitate. | Rivertown Property Inspections, pollen, dander and other allergens the primary advantage of the cools! One of two fan motors in an A/C & heating system can affect the from. Minute after the temperature setting, the blower fan has a switch on the “ ”. Is Better conditioner on HEAT mode the unit purely operates in heating mode is in the attic fill. Set the desired temperature, it only blows when the fan – often called the condenser fan that of... Posted on November 5, 2019 blower ; a fan inside your system is running when look.