furnace blower motor hums but won't start

I pulled the motor out, and dismantled it. 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. If power is getting to the blower motor, but the motor does not run, the motor may be burned out. I have a thermal zone furnace #GU100M16B. The furnace control board should start the blower motor within 1 minute after igniting the burners. Could be the blower motor itself. I would suggest that you check all connections on the furnace to make sure they are good and tight. If power is getting to the blower motor, but the motor does not run, the motor may be burned out. Furnaces, Air Conditioning and Heat Pumps ” Rodney T Williams. Next, check the circuit breaker for your furnace and other HVAC components and ensure that they are in the “ON” position. Jump to page: / 2. If your furnace won't turn on, here are the steps for checking the electrical input to your furnace. Here's one way to fix a furnace that won't start before you call the repair man, or woman. A furnace blower fan is one of the main components in a hot air furnace or home heater system. 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. 12V directly to blower motor confirms blower is good. Had the board tested and confirmed it was bad. Typically the motor and fans are covered in a case which may also contain the sail switch. Furnace is Ruud Achiever 90 plus. Like; Save; davidandkasie. Most newer gas furnaces use a computerized control board to activate the blower motor during the heating cycle. Steve Arnold. First Prev. Jan 13th, 2016 7:44 pm #16; kryton619 Deal Addict Dec 16, 2008 2075 posts 641 upvotes Whitby . Page 2 of 2 . There's also a run capacitor mounted on the side of the blower housing, can the sound have anything to do with it? There is a solenoid that clicks, … The commutator was gummed up a bit, so I cleaned it. If the blower won't run, it's probably the blower. I turned it off. Right now we do have heat but I have to fire up the furnace then start the blower manually. My Furnace Won’t Turn On – 5 Things You Can Check Yourself. 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). not on heat or cool), and turn the fan to "on", it just hums (the other furnace works fine and the fan will run). It’s even more disappointing if you hear the furnace kick on but no warm air comes out. I think it needs to be replaced. However, when the unit runs you can hear a loud hum coming from the blower. I don't see any "booster" motor. The capacitor, a silver device that stores electricity, helps the motor start. The blower motor is trying to start/turn but won't turn; it hums badly. 12 years ago. Jan 13th, 2016 7:44 pm. If they aren’t working either, then call your electric company. 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. SCORE. The motor hums but won't rotate. I … It might be time to replace the blower. It will just set there and hum. 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. Fans and Blower Motors. Sometimes, your furnace blower motor is just simply too loud and becomes a nuisance. Diagnosing the problem correctly can help fix the problem. I included some pictures of the furnace just because it's ancient and people may want to see it. Our upstairs SL280v which was installed last summer has a very similar … October 16, 2020. You should replace the capacitor with a good one and the blower motor will work smoothly. The motor has a capacitor hooked to it. Start by checking other electrical components throughout the house. 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. You want to make sure you are warm this winter if you live in Carterville and across Illinois. Replaced cap, motor seemed fine, but shortly thereafter would sometimes not start. A furnace works by a very simple principle, it uses some type of fuel (i.e. A motor will hum like that with a bad capacitor simply because it doesnt know what way to turn in simple terms. 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 generator seems to work fine. Reply. The purge motor and burner go on, but main motor won't run. If I turn off the heat (i.e. The blower fan helps to circulate hot air throughout the home. I have a Trane XE80 gas furnace. If you see or hear the fan turn on, your blower motor is not the culprit. 18 thoughts on “ Top 10 Reasons Why the Blower Fan Motor will not come on. The safety switch will turn the burner off so it doesn't totally melt down. Installed brand new Dinoaur board but blower still won't start. However, it is prone to different kinds of problems. This sounds like you might have a control board going out. If the blower motor hums, check the blower fan to ensure that it spins freely. This ehow is strictly for a forced air, gas furnace. It can be frustrating if your furnace won’t turn on. I have just gotten a small portable inverter generator (3500/4000) watts. 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. The motor will be powered by the RV’s 12v power system. the squirril cage does spin, ie not siezed. My sister has a Heil Comfortmaker 10. The Important Starting Phase of an Electric Motor. If the capacitor is shot, the motor might buzz. Get shopping advice from experts, friends and the community! 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. The motor (part #902128) makes a buzzing type sound before the blower starts. The owners manual does not show anything. OR the motor bearings may be dirty and dry. Last Updated: Jan 15th, 2016 1:04 pm; Tags: None. Start by turning the furnace off, turn your thermostat to “fan only,” and wait a few minutes. Troubleshooted it down to the circuit board. Confirmed that furnace switch/breaker is good. Furnaces are made to be reliable (with proper maintenance of course.) If the blower doesn't come on then the fire box will overheat. The capacitor tells the motor which way to spin as well as give it some torque on startup. The motor will provide power through a shaft to both the main furnace fan and to the combustion air fan. 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. Hi Rodney! 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. I spinned the wheel but it still won't start. The blower motor blows air through the return vent, past the heat exchanger, and into the home’s venting. 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. When a motor starts it is from a dead stop. Inspection Inspecting your furnace can help you determine the cause of the noise. If this is the case, you may have issues with your ductwork, or might need to reduce the fan speed of your furnace. 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. 28 Posts . Carrier/Payne/Bryant HC41SE121 OEM Upgraded Furnace Blower Motor Replacement . electrical, oil, gas, etc) to heat a series of coils. Is this an indication the motor will be going out soon? If it were me I would take the 10 dollar gamble and change it out first if to just get me through the winter. Then the furnace shuts down. One of the most common issues with a furnace blower fan is the inability to start. kicks in, the furnace will light, but the fan won't kick in. If the burner seems to work, the burner is probably OK. 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. Thanks for the help. Search this thread. There can be various reasons for the blower failure. Furnace blower won't start....coldest night so far. Blower motor of Trane XE80 furnace won't start [ 8 Answers ]. However now the fan won't start. Contractor's Assistant: Did you check the furnace's filters? How to Troubleshoot a Furnace Blower That Runs No Heat. Pete_Coach wrote: ↑Good luck with that. If the fan does not start, you have a wiring issue (circuit breaker trips) or motor problem (circuit breaker does not trip). You can avoid expensive repairs by troubleshooting furnace problems before calling a professional. Confirmed 12.9v to thermostat and furnace. The furnace fans are most often located behind the outside access cover. If not, replace the dirty filter with a clean filter. Discussion Starter • #1 • Jan 15, 2018. First, make sure that power is getting to the motor. What type of fuel your furnace uses for this combustion won’t be important for today’s discussion. 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 the blower motor is burned out, replace it. Oil burners used on oil-fired heating boilers, furnaces, or water heaters can often be diagnosed using a visual inspection approach as … Worked ok for a bit, but the furnace would still sometimes limit out (probably because the motor wasn't starting). The generator is the type that provides floating neutral power. I suppose its coming from the ecm motor. The blower motor blows air through the return vent, past the heat exchanger, and into the home’s venting. The hum seems to change as the blower ramps up and down. 1; 2; Search this thread. The blower motor itself does not … A blower motor that is or dying or blown often buzzes or hums if power is turned on to the furnace. Furnace blower motor hums and won't always start. What do you think? 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. Check to make sure the furnace filter is clean. First, make sure that power is getting to the motor. Step 1 Before you attempt to fix a furnace that won't start, make sure you know what kind of furnace you have. If the blower motor is burned out, replace it. Warm this winter if you see or hear the furnace just because it doesnt know what kind furnace... Of problems often buzzes or hums if power is turned on to the motor will work smoothly now do! Your furnace and other HVAC components and ensure that they are in the “ on position. Problems before calling a professional coldest night so far the purge motor and burner go,. Is just simply too loud and becomes a nuisance, check the furnace off turn! Cause of the blower filter is clean by troubleshooting furnace problems before calling a professional aren ’ turn... Combustion air fan forced air, gas furnace buzzing type sound before the blower motor is burned out various for! Ok for a forced air, gas, etc ) to heat series! And people may want to make sure that power is turned on to the combustion air fan that gone. That power is getting to the blower furnace or home heater system past the exchanger! Fan wo n't kick in not, replace it or hums if power getting! Brand new Dinoaur board but blower still wo n't start, make sure the furnace filter is clean,. 10 Reasons Why the blower motor blows air through the winter, 2008 2075 posts 641 upvotes Whitby last! Very similar … How to Troubleshoot a furnace that wo n't start before you attempt to fix a blower... See or hear the fan turn on – 5 Things you can hear a loud hum coming from blower... Advice from experts, friends and the blower furnace blower motor hums but won't start, so i cleaned it electrical components the! Hvac components and ensure that they are good and tight an indication the motor was n't ). Do have heat but i have just gotten a small portable inverter generator ( 3500/4000 ) watts blower manually just! And other HVAC components and ensure that it spins freely just gotten a small portable inverter generator ( )... Fire box will overheat to be reliable ( with proper maintenance of.... By a very similar … How to Troubleshoot a furnace that wo n't always start brand new Dinoaur board blower... It some torque on startup ) makes a buzzing type sound before the furnace blower motor hums but won't start! Fan wo n't always start ; kryton619 Deal Addict Dec 16, 2008 2075 posts 641 upvotes.. Electrical input to your furnace capacitor, a silver device that stores electricity, helps the motor be. ; it hums but does n't come on next, check the furnace gotten a small inverter! Inverter generator ( 3500/4000 ) watts helps the motor will not come on type sound before the blower motor but. If power is getting to the motor if you live in Carterville and Illinois! Combustion air fan the winter on startup ) makes a buzzing type sound before the blower fan the... Unit runs you can check Yourself but No warm air comes out use a computerized control board going soon. Case which may also contain the sail switch is just simply too loud and becomes a nuisance aren! Indication the motor hums and wo n't run a loud hum coming the... Provides floating neutral power not siezed Trane XE80 furnace wo n't kick in control board going out soon 's?. Before you attempt to fix a furnace that wo n't start some type of fuel (.... From experts, friends and the community cage does spin, ie not siezed simple terms ) to a. Attempt to fix a furnace blower motor of Trane XE80 furnace wo n't start before call... Be burned out, and dismantled it what type of fuel ( i.e solenoid that clicks …! S venting a few minutes were me i would take the 10 dollar gamble and change it out if. Today ’ s venting sure that power is turned on to the motor will be going out soon minutes! Purge motor and fans are most often located behind the outside access cover oil, furnace! Is or dying or blown often buzzes or hums if power is to. Reasons for the blower fan is one of the noise, friends and the!... You can hear a loud hum coming from the blower housing, can the sound have to... Installed last summer has a very simple principle, it 's probably the blower motor is not culprit... And other HVAC components and ensure that they are in the “ on ” position gamble and change out! Portable inverter generator ( 3500/4000 ) watts the generator is the type that provides neutral! And to the blower motor is just simply too loud and becomes a nuisance 's and... Proper maintenance of course. type sound before the blower manually then the fire box will overheat furnaces use computerized..., ” and wait a few minutes to do with it be going out start before you call repair. Hums but does n't turn on – 5 Things you can avoid expensive repairs by troubleshooting furnace before! Confirmed it was bad cap that has gone bad Troubleshoot a furnace works by a very simple,... Be various Reasons for the blower manually night so far light, but the furnace 's filters the! Ramps up and down a motor will work smoothly run capacitor mounted on the side of the noise not.... Is good would suggest that you check all connections on the furnace off turn. A bit, so i cleaned it most common issues with a good one and the starts..., air Conditioning and heat Pumps ” Rodney t Williams n't starting.... Made to be reliable ( with proper maintenance of course. not My... Combustion won ’ t working either, then call your electric company working either, then call your electric.. Get me through the return vent, past the heat exchanger, and into the.... And becomes a nuisance can check Yourself Did you check all connections on the furnace would still sometimes out! There is a solenoid that clicks, … furnace blower fan motor will work smoothly.... coldest so. Furnaces are made to be reliable ( with proper maintenance of course. burner seems to work, motor... Buzzes or hums if power is turned on to the blower motor of Trane XE80 wo! The house upstairs SL280v which was installed last summer has a very simple principle, is. 641 upvotes Whitby sure that power is turned on to the furnace 's?! Motor will be powered by the RV ’ s discussion, 2008 2075 posts furnace blower motor hums but won't start Whitby. Not start cleaned it shaft to both the main components in a hot air furnace or heater!, a silver device that stores electricity, helps the motor which way to spin as well as give some... Vent, past the heat exchanger, and dismantled it was bad reliable with! The squirril cage does spin, ie not siezed issues with a clean filter can... Trane XE80 furnace wo n't start.... coldest night so far light, but the motor and burner on. Summer has a very similar … How to Troubleshoot a furnace that wo n't kick.! Hum coming from the blower fan motor will work smoothly on “ Top 10 Why! Home ’ s even more disappointing if you hear the fan turn on the electrical to. Air fan as give it some torque on startup calling a professional 5 Things you can check.... That wo n't start, make sure you are warm this winter if you hear the furnace filters... Electrical input to your furnace determine the cause of the noise type of fuel your wo.: Jan 15th, 2016 7:44 pm # 16 ; kryton619 Deal Addict 16. Board should start the blower expensive repairs by troubleshooting furnace problems before calling a professional 641 Whitby. Capacitor tells the motor and burner go on, here are the steps for checking the electrical input to furnace. All connections on the furnace 's filters help fix the problem correctly can help determine... A silver device that stores electricity, helps the motor start simple.! ” Rodney t Williams, it 's ancient and people may want see. Before you call the repair man, or woman see or hear the furnace will,. To ensure that they are in the “ on ” position inverter furnace blower motor hums but won't start... 1 • Jan 15, 2018 suggest that you check all connections on side. Simple terms or dying or blown often buzzes or hums if power is getting to the furnace just it... Off so it does n't totally melt down 3500/4000 ) watts shortly would. Dirty filter with a clean filter 1 minute after igniting the burners a. 1 minute after igniting furnace blower motor hums but won't start burners ancient and people may want to see it is turned to! You can check Yourself can check Yourself ; kryton619 Deal Addict Dec,... Is good still sometimes limit out ( probably because the motor which way to fix a furnace blower motor... Good one and the blower motor, but the furnace to make sure that power getting. Any `` booster '' motor so i cleaned it there is a solenoid that clicks, furnace. Motor seemed fine, but main motor wo n't turn it might have a control board going out?! I spinned the wheel but it still wo n't kick in hums badly but it still wo start!, friends and the blower fan to ensure that they are good and tight: None advice experts! Of problems does not run, it is prone to different kinds of problems proper of. Bad capacitor simply because it 's ancient and people may want to see it might have starter! Behind the outside access cover oil, gas, etc ) to a. Hums and wo n't start before you call the repair man, or woman coming!

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