Forums | Home Repair | Home Improvement | Painting | Interior Decorating | Remodeling | Landscaping


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 01-31-2008, 09:31 PM   #1
Newbie
 
Join Date: Jan 2008
Posts: 25
Share |
Default

Blower Motor Whining


Blower Whining –

I recently had a Rheem modulating furnace installed and two-zone heating/cooling. They also installed a 10 inch bypass damper for a 3.5 ton air conditioner.

I had a problem with my blower motor whining which was caused by too much backpressure in my duct work. The contractor is talking about two solutions.
  • 1. Increase my bypass damper to 12 inches.
  • 2. Reduce my blower speed.
Is one option preferred or does it not matter?

Thanks,
Jerry




Last edited by Jerry8C; 02-01-2008 at 11:23 AM. Reason: To clarify.
Jerry8C is offline   Reply With Quote
Old 01-31-2008, 09:34 PM   #2
Union HVAC Tech.
 
Join Date: May 2007
Location: New Jersey
Posts: 607
Default

Blower Motor Whining


Maybe he just needs to properly adjust the bypass damper. The bypass isn't just for a/c, it's there to regulate the amount of air going into the ducts when your only using one of the two zones.
__________________
The Veto propack, the Louis Viton of tool transportation.
bigMikeB is offline   Reply With Quote
Old 01-31-2008, 09:44 PM   #3
Newbie
 
Join Date: Jan 2008
Posts: 25
Default

Blower Motor Whining


Mike -

Thanks for your return. Adjustment has been tried. As I understand it, a 10" bypass is used for a 3 ton AC, and a 12" bypass is used for a 4 ton AC.

I fall between the two.

Jerry
Jerry8C is offline   Reply With Quote
Old 01-31-2008, 09:57 PM   #4
Union HVAC Tech.
 
Join Date: May 2007
Location: New Jersey
Posts: 607
Default

Blower Motor Whining


How long is the bypass ducting in total? Was it done in flex or hard pipe?
__________________
The Veto propack, the Louis Viton of tool transportation.
bigMikeB is offline   Reply With Quote
Old 02-01-2008, 11:20 AM   #5
Newbie
 
Join Date: Jan 2008
Posts: 25
Default

Blower Motor Whining


Quote:
Originally Posted by bigMikeB View Post
How long is the bypass ducting in total? Was it done in flex or hard pipe?
It was done in hard pipe. It measures about 60 inches along the centerline of the pipe.

Jerry
Jerry8C 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
Comfortmaker blower intermittent problem jh44ny HVAC 12 07-31-2011 06:41 PM
Heat comes on but blower never does aczer HVAC 12 02-13-2011 06:57 AM
Looking for blower motor capacitor dditch66 HVAC 3 11-26-2007 07:35 PM
Blower control board mlmaher HVAC 1 11-24-2007 01:39 PM
Induction blower seal ktritz HVAC 4 03-05-2007 08:52 PM




Top of Page | View New Posts

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