When your fan is continuously moving the air, it helps to dry it out. What do I need to fix? Answer Save. Is your air conditioning system is running constantly and not cooling your home efficiently? It's a new house (just passed 1 year), and a very modern high efficiency furnace. Less frequent starts and stops of the fan can reduce the stress from startup, and potentially help extend it’s lifespan. @johnblack I checked it while it is on cold state, but then when turn the AC ON the Radiator Fan turn on, so I let the AC ON while i drive my car, after 30mins driving if i turn the AC OFF, the RADIATOR FAN still dont work, even the Radiator Temp was hot. Leaving Your Fan on Auto. There are a few positives to this feature. Archived. When your AC system is functioning as it should, it runs in cycles. Is your air conditioner not blowing cold air? Free Quotes on Any Repair or Installation. Here are the pros and cons of the ON vs Auto setting on your thermostat. @ Tallra1 I already checked the wirings, and its all in good shape, but i havent check yet the main thermo-switch. Since, you said, "only the fan is blowing outside." Almost everyone has fans in their homes; they come in many different styles including boxes, towers and even the exhaust fans that are designed to blow in fresh air while sucking out the stale air in our homes. Pros to setting your thermostat fan setting to AUTO. 1 decade ago. This sensor switches the cooling fan off and on as needed. The fan’s “AUTO” setting works with your heating + cooling system, so your fan is running the least amount of time needed, at the slowest speed. Note that some systems and thermostats have another option called “Circulate”. Trane air conditioners provide central cooling that can turn a hot and muggy day into a cool breeze. But the best course of action is to get an HVAC expert to check the problem for you. The truth is that your ducts are going to heat up when it gets really warm outside, and this is especially true if they are located in your attic or under your floor. The blower will automatically run at different speeds, giving you the benefits of lower electricity bills and increased comfort. Pretty much there is nothing you could do. Leaving a fan in the "on" position can actually lead to an increase of infiltration of outside air into your home. Do I need a new wall (thermostat) unit or something? The fan will only turn on in the run position. Less frequent starts and stops of the fan can reduce the stress from startup, and potentially help extend its lifespan. Auto helps distribute air in the beginning of the cooling or heating cycle and then cuts off when the set temperature is reached. If the ac is running, then the fan is running. The primary purpose of this fan is to blow the air that has been cooled inside of the exchanger all throughout your home via a series of ducts. It could cost you hundreds of dollars a year. (According to my Brultech meter). Running the 300-watt fan continuously in the “on” position will increase your monthly energy bill. It’s an ages-old debate: does it do any good to run your blower fan in your home without turning on the air conditioner itself? The fan only runs when the system is on and not continuously. In contrast, the alternating current fans, or AC fans, are powered with a changing voltage of positive and of equal negative value.In general, this changing voltage has sinusoidal shape. (Not Recommended) Setting the FAN to “ON” is not needed to run the AC or HEAT. We are also extremely proud of our “Super Service” awards, presented yearly by Angie’s List, for our high standards and customer satisfaction. Learn the most common causes … This allows you to set the fan on for a certain amount of time every hour. I live in the deep south of the US and it's starting to warm up here. A typical AC fan motor uses about 500 watts when it’s running. Running the fan continuously makes the humidity worse and your home less comfortable. Your other option is to set your fan to AUTO, which means the fan runs when directed to by the unit. According to Energy.gov, “If you use air conditioning, a ceiling fan will allow you to raise the thermostat setting about 4°F with no reduction in comfort.”So let’s assume you keep your central air conditioner at 76 degrees when you’re home. The auto setting turns the fan on only when the air conditioning or furnace is actively running. If your unit's fan is not working efficiently or at all, however, your unit's overall performance can diminish. While it may make sense since it helps to circulate air and keep things from getting stuffy, it may actually be costing you more money in the end. In this video we show you an easy to follow DIY Fix for AC Compressor Fan Not turning On, Just Humming. It is more energy efficient to run the fan without the air conditioner, but only in certain situations and for short periods of time. Close. So, is it a good idea to run your whole-home blower fan to remove stuffiness and provide cooling relief? This can cause problems with your thermostat and overall HVAC system. 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. This means that when you turn on the fan and let it run, the only thing you’re doing is circulating hot air throughout your home – and the air in the ducts might be warmer than the air in your home in the first place. The Toyota's fan only turns on when the coolant reaches a certain temperature, which is measured by a sensor. It’s best to just allow the air conditioner to do its job. By turning only the fan on in your air conditioner, you are still keeping things cooled off. This option is much more cost effective because you are using less energy. However, since you are not using the refrigerant in the air conditioner, the effect is not comparable. Unless we are talking different fans here. That kinda don't make sense. Running the fan for a long period of time with any system (central air or window box) will also increase the humidity in the room. We offer emergency repairs, routine furnace and AC services, and maintenance plans. If you have leaky ducts outside the building envelope, either higher infiltration (air leaking in) or higher exfiltration (air leaking out) will add to your energy bill and make your home less comfortable. The direct current fans, or DC fans, are powered with a potential of fixed value such as the voltage of a battery.Typical voltage values for DC fans are, 5V, 12V, 24V and 48V. The furnace fan runs but it just blows cold air. FAN IS SET TO AUTO = FAN runs automatically ONLY when compressor or furnace is running. Therefore, if you run the fan continuously for a 30-day month (720 hours), you would use 360,000 watt hours (720 x 500) or 360 kilowatt hours (kWh). Fan constantly running despite low CPU Usage, Windows 10 I have an Asus Vivobook S200e which has been running fine. However, the difference in power consumption will largely depend on a few factors such as how cool the unit is set to. An AC unit on Fan mode usually consumes about 150W with the fan running, while the AC unit consumes 1000W when on default or Cool mode. The average unit has a 500-watt fan, which uses almost as much energy over the course of the year as a refrigerator, resulting in a $50/month bill. This presents a series of issues, though. If you turn on your ceiling fans, turn your air conditioner up 4 degrees to 80 degrees. Though having only one fan speed usually indicates a bad blower resistor, a diligent mechanic at a repair shop will test the resistor, fan switch and connections to … Of course, there are a few circumstances in which it might be a good idea to run the whole-home fan for a while in order to maintain your comfort level. 6 5 56. AC Troubleshooting Guide to Fixing a Constantly Running AC Unit. Many systems can be set to run the fan even when no heating or cooling is taking place. Despite hearing the sound of the AC turning on, your house is not cooling down as it used to. Typically, this means one of two things: your outside AC hums but the fan doesn’t spin or the entire outside AC … We often hear the debate around whether or not to run your AC Fan continuously. If you don’t want to turn the fan off and on all of the time, there are some new technologies that will allow you to program the blower fan to run for 10 to 15 minutes each hour. expect call technician.. Good luck. © Copyright 2020 - Bayside Heating and Air, AC REPAIR POINTERS THAT CAN SAVE MONEY – CHECK YOUR BREAKER. When you set your fan to “ON,” you’re telling it to keep running 24 hours a day, 7 days a week, regardless of the heating or cooling setting. In fact, even your central air conditioner is equipped with a fan powerful enough to force air through your entire home. The compressor runs but no fan. Let's say when it temp drops to 65 then heater is turning on and then turn off at 67, but fan is still running and reaching temperature to 79 then AC is automatically turning on to get the temperature back to 78/77 then the entire system is calming down finally. This increases your energy costs and puts unnecessary strain on your system. Leaving the fan on 24/7 ensures cleaner air, as the air is pulled through the filtration or UV light system (assuming you have one of these features). I'll also guess that the indoor blower is not running. No matter how well they are insulated, the heat is going to get in. 1 0. Better dehumidification. The auto setting is energy efficient and may be enough for most typical-use homeowners. My air conditioner all of a sudden will not turn on the fan in the auto position. Here are the pros and cons to this approach: There is no right or wrong answer. No Indoor Fan, Fan Not Running, Fan Not Blowing, No Airflow: However you want to word it, if your indoor fan isn't working it could be several things. Using AC vs fan only. The best thing you can do to avoid costly AC Repairs is to make sure you are maintaining your unit properly. Check to be sure the filter is correctly in place and consider upgrading the filter to a higher efficiency filter or the highest-rated filter that your system fan and filter slot can accommodate (consult your HVAC manual or an HVAC professional for details). The fan moves the air around to keep it from being still and heavy. For a safe and fast repair, contact Petro Home Services. If it’s hot outside, running this fan isn’t going to do much to help you stay comfortable. HVAC in the News: Should I really set my thermostat to 78 degrees? AC compressor not working but fan is running, this may cause you some discomfort and concern. Not really. Inside of your air conditioning unit, there is something known as the ‘blower’. It is important to remember that you should never use the "fan" mode for a central air conditioning unit the same way you use a regular room fan. Veritas et Aequitas ( ) Lv 7. Cons to Setting fan on Auto: You may feel a less even distribution of heating and cooling because once the thermostat is satisfied, the fan stops moving air to other spaces in the home. Of course one of the best ways to save money is to regularly maintain your unit. My home ac fan will only run in on mode, not auto. Using the pros and cons above you can decide for yourself what will work best for you. 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