A continuous green light means the IFC circuit board needs replacing. How to Convert a Furnace Blower Fan Into a Stand Alone Fan, What to Do When a Furnace Blower Fan Won't Start, How to Replace the Resistor on Air Conditioner Blower Fans. All rights reserved. Design Engineer/Project Manager for injection molded plastic company Please note that mounting bracket consists of top and bottom brackets joined by 6 metal screws (fig.6.9). Note: (High voltage is always going to your blower motor along with the common for the 24 volts. ASE Certified Master Auto Technician Turn off power at the main electric panel. DoItYourself.com, founded in 1995, is the leading independent A MERV 16 filters particles at a level near that or a HEPA. We welcome your comments and suggestions. Continue reading to learn how to lower the fan speed. Run a jumper from "R" to "Y2" and the blower will run continuously at the second-stage cooling speed. Variable Speed units continuously communicate with each other and your Trane thermostat to provide optimal efficiency. #3. My gas furnace has two options for the blower speed: MED, and MED-HI. However, a higher MERV rating may not be best for your system. (Without enclosing my house in a climate-controlled bubble). (Variable & Multi-Speed Types) In this HVAC training article, we will be discussing how to adjust the fan speeds on an indoor ECM variable speed blower motor and an ECM constant torque/multi-speed blower motor. The problem is, the furnace control module doesn't use a separate speed when the unit is running in continuous FAN mode. home improvement and repair website. There are two types of fan motors found in furnaces: 1.) I can unsubscribe and opt-out from future communications at any time. Helm is an accomplished DIY craftsman. Only swap these two wires. Running your furnace fan all the time isn't exactly a bad thing. In my searching I have found out that there is a stupid little thermistor that burns out on the motor circuit board (it's a variable speed blower), and replacing it is a permanent fix.. For 240v units, both the L and N are hots. According to the company, the slower circulation speed reduces energy consumption by 75%. The system might not work properly. Asking for help, clarification, or responding to other answers. On the motor, only one of the 5 numbered taps has 24v power at a time based on the speed desired at the control board. Can I retrofit a 2-speed or variable speed blower on a Payne PG8UAA forced air furnace? Step 3: Adjust the Pulley on the Blower Drive Motor Presently the settings for the cooling mode is speed 7 (C1.7), heating mode at speed 5 (H1.5), and continuous fan mode is set at the lowest speed (CF.1). If power is getting to the blower motor, but the motor does not run, the motor may be burned out. Proper duct sizing can resolve the issue you are having. There is no humidistat. The installation guide clearly describes how to set airflow for heating mode and cooling mode. He has several years experience as a professional cabinet builder, and he is an accomplished auto repairman, having operated an auto repair business for many years. Wires from the 16 pin plug are connected to this board. I.e., maybe more heat is now escaping through the exhaust. I'm not in enhanced mode. Connect and share knowledge within a single location that is structured and easy to search. Yes--the efficiency of the heat exchanger will decrease. If the control board is at fault, replace it. Questions of a Do It Yourself nature should be The heat exchanger warms up the incoming air and a blower or air handler sends the warm air throughout the home. DoItYourself.com, founded in 1995, is the leading independent home improvement and repair website. My heat is running cold! Filters help protect the many parts of your heating and cooling unit from debris and buildup that can shorten the working life of the system. allows the furnace's circulator blower to operate at a slightly lower speed (85% of desired speed) during a combined thermostat call for cooling and dehumidistat call for dehumidification. Well, it does make sense that lowering the blower speed would reduce its electrical consumption. Black: High; Yellow: Medium-high ; Blue or brown: Medium-low; Red: Low; Again, this can usually be found in the upper-left corner. Heating, Cooling, Air Conditioning, Ventilation and T-Stat Controls, 3-Speed, 4-Wire Ceiling Fan Switch Wiring. Here's hoping for some good answers. I think that when it is in enhanced mode the fan only runs at 50%, you can try changing your dip switches to see. The remaining colored wires will be default speeds. On my furnace the schematic showed there were three speed settings. Meanwhile, the Circulate setting is a hybrid and auto that keeps the fan running throughout heating cycles and then again for a few minutes every hour even when the furnace is off. A second filter location for most HVAC systems and furnaces is the air handler portion of the system. -The "AC/HP CFM Adjust" is the airflow volume to be set for system, efficiency, comfort. Reddit and its partners use cookies and similar technologies to provide you with a better experience. I want to increase volume flow if possible. One of these wires will be coming from the thermostat and the other will go to the outside unit. Click System Options. There is no mechanism to change this. In the manual, it lists some settings, e.g. It would have no affect on the Heat settings. CFM stands for "cubic feet per minute." This helps the XR80 conserve more of the heat it produces. Changing the fan wire connection between the fan-on relay and the fan motor, selecting a high, medium, or low speed right on the fan motor itself Changing jumper positions on the control board (printed circuit board shown below) in the air handler Changing a dip switch or small slider switch position provided on some air handler control boards Iappreciate all the comments, questions, and responses that Ireceive from each of you. When the summer air conditioning season transitions to the fall heating season, increase the blower speed by switching the wires on the cool and heat terminals. He farmed commercial garden produce for several years. and as I recall, you have the HW VP IAQ stat. Connect Y2 on thermostat to BK on furnace, and Y2 on the Condensing unit Cut R-BK jumper at Furnace Install R - O jumper at Furnace Connect W2 on thermostat to W2 on furnace (or alternatively, jumper W1 to W2 at furnace and confirm that dip switches are set correctly for Stage Delay if furnace is desired to automatically control heating stages) the module must be a trane furnace model specific programmed and is available separate from the motor. The blower fan on this blower has four speeds. Website operating The gas kicks on and is lit by the ignitor. Is it suspicious or odd to stand by the gate of a GA airport watching the planes? Thoroughly rinse the filter. In order to measure air flow you could use a flow capture hood, a rotating vane anemometer, or a hot wire anemometer. @Dave: Those were my thoughts as well. Cross country truck driver -- over dimensional freight Slowing the blower speed reduced the noise but I take it you would still like it to be more silent. Usually there will be three "speeds" ranging from 40 to 100% of airflow. There is a modification that will allow the VS fan to run on high speed at all times while in the AC mode and with the fan "ON" mode. When the R-G circuit is made, the blower motor operates on heating speed. The blower speed for a gas heater is selected so that it is comfortable for the building occupant but also so that the Delta T (Temp Rise) does not continue to rise. HVAC system for small church has twin Trane XR90 units installed in 2009 to replace a unit with a much larger single blower. When the humidity is high for what its set at. Top 10 Spots! Especially with a high efficiency furnace, however, it may be that the decreased electric bill saves enough to offset the "loss up the flue" not sure. Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. Other than removing the module and seeing burnt components it must be diagnosed by a professional with a techmate tool ( allows you to test the motor and module and determine cause of error). Fortunately, theres a simple fix if you look at your furnaces Integrated Furnace Control (IFC) board. Air Filters remove dust, lint, pet dander, and other pollutants so you can breathe easier knowing your indoor air quality is better with Trane. In Dungeon World, is the Bard's Arcane Art subject to the same failure outcomes as other spells? The only alternative is to raise the discharge temperature. The system also accounts for blocked vents and dirty furnace filters, and adjusts fan speed as needed to compensate. H.R. Should I upgrade to a pcm br compatible thermostat? If the blower motor is burned out, replace it. When you open the panel, it kills the power to the furnace. To recap: The service technician might be able to increase (or decrease) the blower speed, but that would probably lower the AC's cooling efficiency. They do this by coupling a sophisticated, programmable thermostat to a variable-speed motor. The constant air turn over at a lower set point keeps the house comfortable. Website operating problems contact Webmaster. Not every AC or furnace filter will have an arrow printed on the frame, but when it does the arrow indicates the direction the filter must face. It is important to know that you cant go by a normal color code to determine the speeds. Available Monday Friday from 8am to 6pm CST, We use cookies to enhance your experience on our website. You can verify the actual CFM by measuring the TESP of the system and comparing it to the manufacturer's airflow data sheet. Does Nest utilize all the benefits of a communicating furnace, Low speed furnace fan blower motor will not shut off, How to calculate efficiency of old Westinghouse furnace VS new variable speed Furnace. I have a Trane Variable Speed Air Handler (TWE049E13FB2). rev2023.3.3.43278. I recently had have a trane xl 90 want to adjust speed of blower fan blower motor has 4 wires white going to neutral black unhooked blue to high speed yellow to I have a Trane Indoor Air Handler Model No. This will allow you to access the control board. Which thermostat wires control the furnace fan? See our Privacy Policy for more information. Step 2: Remove the panel cover of the furnace. It can happen for lots of reasons, from improper furnace sizing and dirty filters to air duct insulation failures to the room being farthest from the furnace. Here are common Trane AC repairs not listed in the guide and their repair cost for parts and labor: Leaking coil and refrigerant: $1,150-$1,750 Thermostatic expansion valve (TXV): $275-$450 Compressor and refrigerant (after ten years, typically): $1,150-$1,600 Failed solder connection on refrigerant lines and refrigerant: $875-$1,220 One thing I found consistently was that making changes on the RS-485 hydro heat control board and W1-W3 jumpering had notable effects (more CFM's at my test register) while messing with the mainboard DIP switches had little to no effect. Connect the common wire to the neutral terminal of the furnace's control board. Thanks for contributing an answer to Home Improvement Stack Exchange! So How Do We Adjust Fan Speed? Western VA. Nov 28, 2009. If the instructions are not with the furnace, you can look up the model number of the unit and search for the installation manual via a google search. Step 3: Find the furnace draft inducer. No need for direct trane replacment motor. It shouldn't take more than a few minutes a day to record the data anyway. I just had a Trane system installed last week and I've been very happy with it! This is an old thread but I am going to post my experience: I have an oil furnace, at some point someone (a furnace tech) adjusted the blower to run slower thinking it would provide more hot air by slowing the air to heat up more before supplying the house. Are there downsides to this. In the pictured example above, if the #5 speed tap is programmed for 1600 CFM and #4 is programmed for 1200 CFM and #5 is presently connected to the "Cool" terminal on the control board via the black wire, we know that the unit is running at around 1600 CFM as long as the TESP across the unit is not too high. Craig creates educational HVACR articles and videos which are posted at https://www.acservicetech.com & https://www.youtube.com/acservicetechchannel & https://www.facebook.com/acservicetech/. You may freely link to this site, and use it for non-commercial use subject to our terms of use. But you will have a tough time measuring either on your basement Trane.