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Learn more about Stack Overflow the company, and our products. Note: (High voltage is always going to your blower motor along with the common for the 24 volts. How to change blower speed on furnace - Trane XB 2018 Ryan W 794 subscribers Subscribe 185 44K views 4 years ago A quick description on how to change the blower speed on your furnace. Switched it to heat (in which case the furnace board is in control of the fan, not the stat) - got fire, no fan. I'm getting a new s9v2. The house has a 3 ton trane xl20i and an xv80 (4 ton max). Heating, Cooling, Air Conditioning, Ventilation and T-Stat Controls, 3-Speed, 4-Wire Ceiling Fan Switch Wiring. The constant torque/multispeed motor will have the smallest module. I'd go with logging temperature differential (inside temp - outside temp) vs. energy consumption every day for a month with the blower on high and then for a month with the blower on low. Typical setups include these wire colors with associated blower speeds. View our Privacy Policy here. Continue reading to learn how to lower the fan speed. . 4TEE3C10A1 That is excessivly loud. When he's not enjoying family time with his wife and three boys, he loves tinkering with projects and geeking out on electronics. Heres What It Means, Why You Should Monitor the Humidity Levels In Your Home. When you open the panel, it kills the power to the furnace. My first thought was that the unit was oversized, but I figured out how to check the DIP switch settings. air flow is inadequate to match demand and duct size. Which thermostat wires control the furnace fan? -The "Blower-on and Blower-off delay" time period can be selected. Stage 3 Aux Heating. http://www.inspectorsjournal.com/Forum/topic.asp?TOPIC_ID=8998&, We've added a "Necessary cookies only" option to the cookie consent popup. Connect the common wire to the neutral terminal of the furnace's control board. Use dish soap and a soft-bristle brush or sponge to remove stuck-on debris. -The BTU/HR size is selectable between 48,000 42,000 36,000 or 30,000 BTU/HR. After a bit of research, (translated: "mad google skills") I found an article claiming that lowering the blower speed may increase efficiency. You have to switch the wires to the blower motor. The blower fan on this blower has four speeds. I know I need to replace a dying blower motor in a 1992 Trane . He maintains fruit and nut trees along with helping his wife with a vegetable garden. Also related, with for instance a variable speed furnace, since it runs continuously and reduces "cold spots" you might find you can set it at a lower degree setting than the off/on kind. Example: 1200 CFM is needed for a 3 ton 36,000 BTU/HR system. The induction motor begins running. Proper Fan Speed Setting During Heating Mode On most control boards there will be a jumper that is marked to show that it controls the speed. I have been reading that the br wire can be used to let the thermostat control the fan speed, or the furnace itself can be programmed to ramp up the fan speed.