ON mode causes the fan to perpetually circulate air through your AC filter. This will then cause the HVAC system to run, possibly overtime, to cool the house back down. 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. If you have a filtration system or UV lights in your home, the air can be cleaner if it is pulled through this system. Because the fan only runs when your home is in a heating or cooling cycle, there … on Facebook on Twitter The indoor unit will blow warm air into the room until the set temperature is reached. I never really thought of any of the negative impacts that could happen. Then there is no gain from this. The auto setting is energy efficient and may be enough for most typical-use homeowners. Air will be flowing through it more often and will clog. You can affect the air movement by setting the fan to auto or on. This fan returns warm air to the condenser (which is the big unit outdoors). On cooling, the fan will run only when the air conditioner is running. 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. When the fan is in the auto mode, the air conditioner moves air only when the cooling part is running. Every thermostat degree warmer in summer and cooler in winter saves you money. The fan’s “AUTO” setting works with your heating + cooling system, so your fan is running the least amount of time … 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. Leave the fan on “auto” when possible. If you put a tall oscillating fan 1- 2feet in front of a window air conditioner (22 inch the biggest standing from Lasko) is what I use. Fan On or Fan Auto. 1. The fan will start about 40 seconds after the burners light and go off about one minute after the temperature is satisfied. The answer is, it depends on where you live. Setting your thermostat involves making more choices than just the desired temperature. The only downside, besides those discussed in above, is that you will nee… When you look at the thermostat, you may have noticed the ability to set the temperature and fan. These two AC components work together to cool the home. When it is set on “auto”, the fan turns on ONLY when your system is running. “On” Vs. “Auto” Let’s first define what the fan settings mean. This fan also “sucks” air through your air filter, known as “return air”. 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 … 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. Full disclosure, as a technician I was guilty for many years of setting fan to “on” at the thermostat. AUTO means the fan turns on “automatically” ONLY when your system is heating or cooling your air. The auto setting turns the fan on only when the air conditioning or furnace is actively running. Or should we set the air conditioner fan to “on” or “auto” setting? Save my name, email, and website in this browser for the next time I comment. We may ask ourselves, can we run the air conditioning unit less? The air is re-circulated from the condenser back to the furnace, where it is turned into cool air … While the “on” and “auto” settings do not affect the cooling capabilities of the unit, one is far more energy efficient than the other. The fan setting controls your AC’s blower; A fan inside your system that helps distribute air throughout your home. “Auto” setting only runs when the system is reaching the set temperature so it does not run continuously. Many homeowners rely on their thermostats to maintain comfortable temperatures and airflow during the summer. Understanding when to use each setting will maximize your experience with any HVAC unit during warm and cool months. If there is only an "auto" setting, turn it to that. ON means the fan is … As a certified a/c tech that's always getting more training on many aspects, it's been proven what is most energy efficient. The fan is always running so this will cause the electric bill to be higher. | Atkinson, How to Fix a Drafty Door and Windows | Rivertown Property Inspections. Your email address will not be published. You adjust the part the cools by changing the temperature setting on your thermostat. “On” setting– Fan is constantly on, even when the HVAC system is not on and is always blowing air throughout the home. The “on” fan setting does not pull the moisture out of the air like the “auto” setting on the unit does, thus leading to mold issues . When the thermostat reaches your temperature setting, the system, including the blower fan, shuts off. HEAT mode The unit purely operates in heating mode. When the fan is set to On, it blows continuously, circulating and filtering air regardless of whether the air conditioner is in cooling mode. Save my name, email, and website in this browser for the next time I comment. Here is a video below about a home in South Florida that left their setting to “on” for 3 months. Air Conditioner Fan Mode The fan for central air conditioning systems is connected to your furnace. When the AC unit runs, the fan helps cooled air reach every air register placed throughout your home. “Auto” and “On” Thermostat Settings. 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. Most systems offer two fan settings: On and Auto. Do you have questions about the settings or need maintenance on your system to make sure it is working correctly? Once the AC cools your home down to the … The thermostat settings allow you to improve AC efficiency and comfort levels within your home. CA License # 332447, Setting your AC Unit for Optimal Comfort and Efficiency. Less noise. We’ve heard this question from customers before, so we put together this article to help you decide which is better for you. Most air conditioner units have buttons labeled "fan" or "auto." Setting Your HVAC Fan to “AUTO” Your other option is to set your fan to AUTO, which means the fan runs when directed to by the unit. May 21, 2018 Bryan Orr 4 Comments. If you’re on the fence about whether to buy one of the modern electric fans, here are some benefits you might not have thought about: 1. When the fan turns off, it prevents condensation from reentering the home, possibly saving homeowners several dollars on energy expenses each month. You want your home HVAC system to take the moisture from the cooling coils to drain and drip outside, especially in the summer months. Understanding when to use each setting will maximize your experience with any HVAC unit during warm and cool months. Typical-Use homeowners on mode causes the fan to perpetually circulate air through your air filter that most our! Or on most fans use a ceiling or plugin fan air filters.! 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