furnace blower motor hums but won't start

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

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