Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > HVAC

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 10-04-2008, 01:34 PM   #1
Newbie
 
Join Date: Oct 2008
Posts: 1
Rewards Points: 10
Default

Furnace blower motor noise


I have a 6 year old ICP System with a gas furnace with a A coil AC unit stacked above. A couple of weeks ago the fan began to make noise when it turned on. I've carefully/safely removed the fan/motor assembly from below the furnace and I've done the following.

1. Checked to ensure that the noice isn't due to the fan having shifted on the spindle of the motor.
2. Ruled out any debris of any type in the fan assembly causing noise.
3. Confirmed that the fan/motor still is noisy when I run the fan outside the furnace housing.
4. Checked the fan itself to ensure that there are no blades that have come detached. The fan appears to be structurally sound/fine.

The motor is an Emerson direct drive 1/2 HP model that mounts via a rubber cushioned bracket.

The only thing I notice about the motor is that the spindle has a small amount of play or movement in it in the direction of the spindle's axis (in the "through the motor" direction), perhaps 3 or 4 mm of movement.

Is it normal for the spindle to have some play in it, or could that be causing my vibration/noise?

The fan kicks on normally, but after the rpms begin to rise, the noise starts. The fan comes up to speed, but the unit stays noisy.

Thanks for any tips or suggestions.

rivershorereid is offline   Reply With Quote
Old 10-04-2008, 02:31 PM   #2
Electrician
 
SD515's Avatar
 
Join Date: Aug 2008
Location: Near Jackson Michigan Area
Posts: 1,450
Rewards Points: 500
Default

Furnace blower motor noise


Sounds to me that there's a good chance the motor is on it's way out, 3 to 4 mm might be a little too much. It has either bearings, or more likely bushings at the end of the armature shaft, where it is supported through the motor housing, and sometimes in addition, a thrust washer that limits end play of the shaft. 6 years may be a little soon for failure, but if it's failed...what ya gonna do.

Some motors have oil ports at both ends of the motor...usually plugged with a small plastic plug. If your have those, you might try a few drops of oil. 20 or 30 weight is usually the norm.

Consider, and call around for a replacement. At least you'll know the ball park price of a new one...and it's always nicer to be proactive and replace/repair furnace parts when it's semi-warm out versus in the middle of the night when it's zero out.

__________________
Kyle

Just because you can, doesn't always mean you should
SD515 is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Bryant 355MAV furnace and A/C blower not starting rajar2 HVAC 31 02-01-2014 12:03 PM
Trane xv80 furnace blower not working jim2138 HVAC 2 03-22-2008 04:55 PM
furnace blower keeps running dmbrasket@hotmail.com HVAC 7 02-03-2008 03:57 PM
RUUD furnace not working blower runs ddeatrick99@hotmail.com HVAC 2 01-16-2008 09:55 PM
replaced furnace blower now breaker issue Kurr HVAC 5 01-25-2007 09:22 PM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.