If your furnace won't turn on, here are the steps for checking the electrical input to your furnace. Is this an indication the motor will be going out soon? I have a thermal zone furnace #GU100M16B. Sometimes, your furnace blower motor is just simply too loud and becomes a nuisance. However now the fan won't start. The generator seems to work fine. A furnace works by a very simple principle, it uses some type of fuel (i.e. Confirmed 12.9v to thermostat and furnace. The blower fan helps to circulate hot air throughout the home. electrical, oil, gas, etc) to heat a series of coils. Our upstairs SL280v which was installed last summer has a very similar … Jump to page: / 2. SCORE. Reply. Search this thread. If the blower fan on your furnace does not start then the furnace burners should burn for a short while until the furnace’s limit cuts the burners off to keep the furnace from over-heating. A furnace blower fan is one of the main components in a hot air furnace or home heater system. If the blower won't run, it's probably the blower. If I turn off the heat (i.e. The motor will provide power through a shaft to both the main furnace fan and to the combustion air fan. First, make sure that power is getting to the motor. It can be frustrating if your furnace won’t turn on. The motor (part #902128) makes a buzzing type sound before the blower starts. I have a Trane XE80 gas furnace. Oil burners used on oil-fired heating boilers, furnaces, or water heaters can often be diagnosed using a visual inspection approach as … However, it is prone to different kinds of problems. Start by checking other electrical components throughout the house. A blower motor that is or dying or blown often buzzes or hums if power is turned on to the furnace. If you see or hear the fan turn on, your blower motor is not the culprit. Like; Save; davidandkasie. It’s even more disappointing if you hear the furnace kick on but no warm air comes out. OR the motor bearings may be dirty and dry. If the burner seems to work, the burner is probably OK. First, make sure that power is getting to the motor. The furnace fans are most often located behind the outside access cover. The owners manual does not show anything. I … Confirmed that furnace switch/breaker is good. If the blower motor hums, check the blower fan to ensure that it spins freely. You can avoid expensive repairs by troubleshooting furnace problems before calling a professional. I spinned the wheel but it still won't start. Furnace blower motor hums and won't always start. Thanks for the help. Furnace blower won't start....coldest night so far. If not, replace the dirty filter with a clean filter. You should replace the capacitor with a good one and the blower motor will work smoothly. Carrier/Payne/Bryant HC41SE121 OEM Upgraded Furnace Blower Motor Replacement . I don't see any "booster" motor. Oil burner won't start or won't keep running: step by step checklist to to diagnose & repair an oil burner that won't run or keeps stopping. Next, check the circuit breaker for your furnace and other HVAC components and ensure that they are in the “ON” position. What type of fuel your furnace uses for this combustion won’t be important for today’s discussion. The furnace control board should start the blower motor within 1 minute after igniting the burners. How to Troubleshoot a Furnace Blower That Runs No Heat. I turned it off. There can be various reasons for the blower failure. The purge motor and burner go on, but main motor won't run. 12V directly to blower motor confirms blower is good. The blower motor is trying to start/turn but won't turn; it hums badly. I suppose its coming from the ecm motor. Fans and Blower Motors. If the furnace has been off for awhile the blower motor works fine, but sometimes when the furnane kicks on the motor will only hum and when not blow even turned to on. The hum seems to change as the blower ramps up and down. Pete_Coach wrote: ↑Good luck with that. I would suggest that you check all connections on the furnace to make sure they are good and tight. It will just set there and hum. I included some pictures of the furnace just because it's ancient and people may want to see it. When a motor starts it is from a dead stop. Contractor's Assistant: Did you check the furnace's filters? Right now we do have heat but I have to fire up the furnace then start the blower manually. Troubleshooted it down to the circuit board. October 16, 2020. i have an amana furnance and the blower works on a/c mode, however the blower will not come on in heating cycle. I have just gotten a small portable inverter generator (3500/4000) watts. If the blower motor is burned out, replace it. Could be the blower motor itself. 1; 2; Search this thread. Jan 13th, 2016 7:44 pm. not on heat or cool), and turn the fan to "on", it just hums (the other furnace works fine and the fan will run). In either case, it’s best to have a pro take a look at your system and determine if there is a way to reduce the noise it makes without decreasing efficiency. the squirril cage does spin, ie not siezed. What do you think? The blower motor blows air through the return vent, past the heat exchanger, and into the home’s venting. I pulled the motor out, and dismantled it. There is a solenoid that clicks, … The safety switch will turn the burner off so it doesn't totally melt down. The HC41SE121 Furnace Blower Motor Replacement is a brand new OEM Upgraded 1/3HP, 115V (208/230v also available), 1075RPM, 4 Speed motor with 48Y Frame, that is compatible with Carrier, Bryant and Payne furnaces, as well as GE and genteq part number 5KCP39JG. If you have a meter or test light, you should be able to determine if the blower motor is getting voltage in the manual mode. Furnaces, Air Conditioning and Heat Pumps ” Rodney T Williams. We had a Lennox SL280v two-stage furnace installed for our first floor a few weeks ago, and we are very satisfied with the performance. Discussion Starter • #1 • Jan 15, 2018. Blower motor of Trane XE80 furnace won't start [ 8 Answers ]. 28 Posts . If your furnace blower motor hums when it’s switched on but at the same time does not actually turn, the capacitor may be damaged. This ehow is strictly for a forced air, gas furnace. kicks in, the furnace will light, but the fan won't kick in. The generator is the type that provides floating neutral power. First Prev. October 16, 2020. LED flashing light flashes continuously when burner is on however, when the burner shuts off, the LED light flashes 4 times at an interval. If it hums but doesn't turn it might have a starter cap that has gone bad. If the capacitor is shot, the motor might buzz. Jan 13th, 2016 7:44 pm #16; kryton619 Deal Addict Dec 16, 2008 2075 posts 641 upvotes Whitby . Check to make sure the furnace filter is clean. The motor hums but won't rotate. Here's one way to fix a furnace that won't start before you call the repair man, or woman. The capacitor, a silver device that stores electricity, helps the motor start. The motor will be powered by the RV’s 12v power system. If the blower doesn't come on then the fire box will overheat. Replaced cap, motor seemed fine, but shortly thereafter would sometimes not start. The motor has a capacitor hooked to it. A motor will hum like that with a bad capacitor simply because it doesnt know what way to turn in simple terms. I just don't understand There's power, the blower is good, the switches seem to work, but the blower refuses to start, it just hums. 12 years ago. If power is getting to the blower motor, but the motor does not run, the motor may be burned out. It might be time to replace the blower. Had the board tested and confirmed it was bad. If the fan does not start, you have a wiring issue (circuit breaker trips) or motor problem (circuit breaker does not trip). There's also a run capacitor mounted on the side of the blower housing, can the sound have anything to do with it? My sister has a Heil Comfortmaker 10. Worked ok for a bit, but the furnace would still sometimes limit out (probably because the motor wasn't starting). If they aren’t working either, then call your electric company. Last Updated: Jan 15th, 2016 1:04 pm; Tags: None. The starting phase of an electric motor occurs for just a few seconds but it requires multiple times the circuit size to deliver this power and start the motor, this is why special motor controls are required for larger motors and prevent the circuit from tripping off during the start cycle. I think it needs to be replaced. If the blower motor is burned out, replace it. Installed brand new Dinoaur board but blower still won't start. Hi Rodney! It is drawing high amperage and the rotor part (the part the fan is connected to) is trying to catch up with the rotating field in the motor winding a buzz is normal at start but should go away as the motor comes up to the proper RPM. However, when the unit runs you can hear a loud hum coming from the blower. My Furnace Won’t Turn On – 5 Things You Can Check Yourself. Step 1 Before you attempt to fix a furnace that won't start, make sure you know what kind of furnace you have. 18 thoughts on “ Top 10 Reasons Why the Blower Fan Motor will not come on. The commutator was gummed up a bit, so I cleaned it. If it were me I would take the 10 dollar gamble and change it out first if to just get me through the winter. Steve Arnold. The Important Starting Phase of an Electric Motor. Background: My blower fan has been working intermittently for the last couple of weeks, however within the last several days it will not start at all. This problem of getting a humming noise along with little to no spinning is very common with motors that do not have good quality capacitors. If this is the case, you may have issues with your ductwork, or might need to reduce the fan speed of your furnace. Then the furnace shuts down. Start by turning the furnace off, turn your thermostat to “fan only,” and wait a few minutes. The blower motor blows air through the return vent, past the heat exchanger, and into the home’s venting. Furnace is Ruud Achiever 90 plus. Page 2 of 2 . You want to make sure you are warm this winter if you live in Carterville and across Illinois. This sounds like you might have a control board going out. Get shopping advice from experts, friends and the community! The blower motor itself does not … Most newer gas furnaces use a computerized control board to activate the blower motor during the heating cycle. Diagnosing the problem correctly can help fix the problem. One of the most common issues with a furnace blower fan is the inability to start. The capacitor tells the motor which way to spin as well as give it some torque on startup. Furnace/AC blower hums but won't turn on ... (the capacitor should only be used to start the fan as far as I can tell, and the fan was having trouble maintaining blade speed this morning). Typically the motor and fans are covered in a case which may also contain the sail switch. If power is getting to the blower motor, but the motor does not run, the motor may be burned out. Inspection Inspecting your furnace can help you determine the cause of the noise. Furnaces are made to be reliable (with proper maintenance of course.) 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