Blower Cycling And Vibration - HVAC - DIY Chatroom Home Improvement Forum


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

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

Reply
 
Thread Tools Display Modes
Old 02-09-2010, 02:51 AM   #1
Newbie
 
Join Date: Feb 2010
Posts: 1
Rewards Points: 10
Default

Blower cycling and vibration


Lately (the past week or so), the blower in my furnace (GE - at least 20 years old, maybe 30, I'm not sure) seems to be cycling quite frequently and vibrating enough to cause the ductwork to rattle a little. Here's what I've done so far and what's happening. I know very little about furnaces, so excuse me if I use the wrong terminology.
I am not going to include my opinions here because what I think should be the right way, may very well not - I need expert opinions and knowledge. I'm getting pretty worried about this.
I removed the blower assembly and wiped it down, though it wasn't really all that dirty. The blower wheel turns very easily and without noise but does seem to be very slightly off center when spinning.
When running, it now vibrates a little less, but that may be my imagination.
When the furnace 'kicks on', first the burners ignite and all 4 bars have pretty even blue flames with the occasional orange lick every now and then. The burners burn for a couple minutes, then the blower motor turns on. It runs for awhile with no noise and a little vibration. Then, the blower motor shuts off but the burners keep burning. After maybe 30 seconds to a few minutes (I didn't time it), the blower motor turns back on. After a while (many minutes - again, I didn't time it), it will again turn off but the burners stay on. This cycle happens about 2 - 4 times each time the furnace is engaged. Finally, both burners and blower motor shut off together.
During this whole time, we are getting hot air and good flow from the vents in the house, seemingly normal.

It has just been the last few days to a week that I've noticed this motor cycling. For years previous, I'm pretty sure that the blower motor did not cycle on/off like this, but I never sat on the floor watching it like I did tonight.
Is this a dangerous situation? Any ideas as to the cause?
Thank you all in advance for any suggestion you can give.

Advertisement

whatshappening is offline   Reply With Quote
Old 02-09-2010, 05:48 AM   #2
Member
 
Join Date: Oct 2009
Location: N.W Suburbs Illinois
Posts: 107
Rewards Points: 75
Default

Blower cycling and vibration


I had the same problem a couple years ago. The fan it wearing out. And out of balance. Mine got to the point where it just flew apart. Had to replace the fan assembly. Better have someone check it out. It keeps cycling because the motor is over heating.

Advertisement

Kurt1968 is offline   Reply With Quote
Reply


Thread Tools
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





Top of Page | View New Posts