Furnace blower loud train like noise

letmetellu · May 27, 2006, 09:26 PM

I am guessing that your blower is a direct drive blower, meaning that the blower wheel is attacthed directly to the motor shaft. The way you discribed the noise leads me to believe that the motor bearings are bad. This is the most common reason for noise coming from the blower compartment. About the only remedy to this is to replace the motor. You say that you motor is permanatly oiled, that is just a waay of saying that it can not be oiled and not being oiled is what causes them to wear out. I don't know what kind of furnace you have but in my area is it is a standard furnace and a regular sized motor and a normal instulatioln the price range for the complete job would be somewhere around $230.00. If you had access to buying the motor and a capacitor you would get by for around about $125 to $150. Post if you need more Information. Hope this helps.
One last thought, with the furnace unpluged feel all around in the blower wheel to make sure that something has not been sucked into the blower wheel and it might be rubbing on something. Use a flashlight and look very good.

fordguy2 · Jun 28, 2009, 01:30 PM

Quote:

Originally Posted by Jonzy

My furnace blower recently started making a loud, low, steady train like noise every time it comes on. It is not a higher pitched squeek, but more like an engine. It is moving air and the cage is spinning. My furnace is supposed to be a perm lubricated motor.

Help!

I have the blower motor and thermostat turned off until I can figure it out.

My blower makes the same sound. I took the motor/fan assembly out. Nothing is loose and the fan turns freely. I turned the fan on and it blows freely without noise but when I partially cover the exhaust opening it vibrates and starts making the noise again. I've checked the A/C refrigerant radiator thingy that is above where the blower exits and it had a lot of dust/dirt/hair covering it. I cleaned that all off. There doesn't appear to be anything else blocking the flow of air. I had replaced the blower motor about six months ago, so I don't think that is the problem. It has worked just fine until about a week ago, and then it started making this noise. It was after I noticed that hardly any cold air was coming out of the registers. I pulled the cover off of the "AC radiator thingy" and a bunch of frost was totally covering the entire thing, so I let that defrost overnight. Now I still get this noise and I'm stumped. The only other thing I could think of was the fan being out of balance, but I don't see any way to adjust this.

Huck01 · Jan 30, 2010, 06:17 AM

The regulator could be freezing.

jpwasko · Aug 22, 2010, 01:38 PM

Here is what I found, my TRANe XE80 blower was making the same noise. I have a friend that looked at my furnace, we started the motor after detaching the Squirrel cage, the motor was quiet as could be. Upon further inspection, we learned the cage is spinning freely from the hub, and it makes the clicking noise. Check the Squirrel cage to ensure the cage does not spin freely from the hub.

ma0641 · Aug 22, 2010, 01:43 PM

Some Goodman/Amana units mount the motor to the blower housing with a 3 point mount, welded to the motor-Chinese-. If top point breaks or fatigue cracks, lots of vibration. Crummy mounting system, can't repair for a 3 cent strap.

wmproop · Aug 22, 2010, 01:53 PM

Quote:

Originally Posted by Jonzy

My furnace blower recently started making a loud, low, steady train like noise every time it comes on. It is not a higher pitched squeek, but more like an engine. It is moving air and the cage is spinning. My furnace is supposed to be a perm lubricated motor.

Help!

I have the blower motor and thermostat turned off until I can figure it out.

I`ve also seen some make this same noise when the blower wheel is out of balance,sometims a simple piece of paper or small amount of fiberglass from the filter can cause a headache,just get down and closefeel around a see if you can find anything,can`t hurt or cost any money

nessa61 · Sep 4, 2010, 07:17 PM

My central unit makes a loud noise when it comes on but pushes a lot of air what would cause this and can I continue to run my unit

nessa61 · Sep 4, 2010, 07:18 PM

My central unit makes a loud noise when it comes on can I continue to run the unit and what would cause this

dbbba · Dec 23, 2010, 07:00 AM

My unit makes the same sound when my filters are dirty and need replacing. When I put new filters in the sound stops. It is a dirty filter warning you are hearing, that's why you are not finding anything wrong with the motor.

Furnace blower loud train like noise

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