The fan is turned off about a minute after the desired temperature is reached. Tip: Avoid setting your fan to ON, it wastes money because it forces the fan motor to run constantly. When set to “on”, the fan on your furnace will blow continually, even when the furnace isn’t actually heating the air. Wait a few minutes, then flip the switch to ON. HAMCO Heating & Cooling has been serving the needs of Hamilton, Burlington, Oakville and surrounding area since 1946. Furnace filters. So if you feel the air blowing out of the vents while the furnace is off, the air will seem cool since it’ll be at about room temperature. Here’s another possible DIY fix for your heater blowing cold air. We don’t just work here in the area, we also live here and are a part of the community. If there is no air coming out of your vents, make sure that your furnace is getting energy. VENT Setting Fortunately, many issues can be pinpointed and, in some cases, even repaired yourself. Rooms have a cold air intake vent, which allows cool air to be sucked down into the furnace. You can do this by turning your fan to the ON setting and seeing if the … 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. Troubleshooting a Furnace That's Blowing Cool Air. Perhaps the furnace is only blowing cold air and not heating? Trouble-shooting/Notes: Switching the thermostat switch to System-Off (vs Heat or Cool) did not turn off the hot air coming out of the registers (i.e. The furnace unit draws air into the unit and circulates it through the duct work to all areas of the home. There are four main components of a furnace. Change filters. Your furnace is overheating. Running the furnace fan all the time means there’s less stale air in the home and can also help regulate cool and warm spots. If your furnace fan is set to AUTO and is still running, then move on to the next section. Our business is as much about our personal reputation and the relationships we build with our customers and neighbours as it is about selling and servicing home comfort systems. When a furnace blows cold air, there may be an issue with the unit’s electronic control panel. Have you … Dirty filters … 'burner' and blower still On). The best way to know which furnace fan setting is right for your home and heating system is to ask the installation technician when they review your new furnace system. AUTO Setting This setting only turns on the fan when there is a call for heat requested. A furnace that is too big will run quickly and heat up the air right next to the thermostat. Do this: Ensure your thermostat’s fan setting is set to AUTO, not ON. ON Setting The main benefit of setting the thermostat to ‘Auto’ is that it will result in more energy efficient usage. Turn off power to the furnace at its ON/OFF switch. AUTO Setting The auto setting on your furnace fan relies on your thermostat to determine when the fan needs to be running. People often have questions about the proper furnace fan setting for winter. Setback at least 8˚ F Setup at least 4˚ F Programmable Thermostat Settings Unfortunately, this is simply not the truth, and it could be the reason that your furnace won’t reach the set temperature. Other thermostat issues. Relight the pilot light if you notice it is out. However, this setting uses more electricity to run, which can be a problem if you have an older furnace with an AC motor. Change the air filter. If you have a smart thermostat with a schedule on it, the auto setting may mean you never have to touch your thermostat again. The Pilot Light is Out. email: info@hamco.ca The fan setting controls the blower, the part that circulates air throughout your home, Setting it to ON means the blower will run 24/7—regardless of whether the furnace is heating the air or not, thus why you get cold air sometimes. When we get calls asking about the furnace blowing cold air, it’s usually because of the ON setting; the air is room-temperature but can feel colder to people. Or will I end up killing myself and my family? If the furnace blower is having problems, though, changing its speed could make a difference in the furnace’s performance. Any other color could be a sign that there is something wrong with your heat source, in which case you need to bring in a professional to troubleshoot your problems. This is sometimes easily solved by resetting the system. A common misconception associated with thermostats is that a furnace works harder than normal to warm the space back to a comfortable temperature after the thermostat has been set back, resulting in little or no savings. Incorrect Thermostat Setting. Once there, it is heated using natural gas, propane, oil, coal, wood, or electricity. In the summer time, you can set the fan to the on position to circulate cool air in the home. Setting Time Setpoint Temperature (Heat) Setpoint Temperature (Cool) Wake 6:00 a.m. < 70˚ F > 78˚ F Day 8:00 a.m. A fan then blows the heated air through another set of ductwork, and finally through heat registers, to every room in the house. However, you don’t have to invest in a new furnace to get benefits of both settings. This works best if the cold air return of your furnace is located in a cool basement or other cool … It is supposed to stay on for two to three minutes after the furnace shuts off in order to push the last of the warm air out into the house. The fuel system, the burners, the fan and the ductwork. If this does not correct the problem, call for furnace repair. If your furnace keeps blowing cold air, you may notice that your air filter is too dirty. When it’s cold outside, the furnace is often the most used appliance in the home. VC Two Stage Furnace Control DIP SWITCHES MUST ONLY BE ADJUSTED WHEN UTILIZING THE LEGACY TERMINAL BLOCK WITH A 24VAC NON COMFORTNET CONTROL. You may hear it kick on and off as the temperature in the house fluctuates. Switches are located in 4 sections vertically, each having 4 switches. Many people let it blow the warm air out without thinking of the internal mechanics. VC Two Stage Furnaces Setting Blower Speeds. 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