Go Back   InterNACHI Inspection Forum > >

Notices

Inspecting HVAC Systems Topics include heating, venting, and air conditioning inspections.

Reply
 
Thread Tools
  #1  
Old 4/17/10, 6:26 PM
Richard D. Slocum's Avatar
Richard D. Slocum Richard D. Slocum is offline
Certified Professional Inspector (CPI)
 
Join Date: Jul 2004
Location: Whitewood ,SD 57793
Posts: 236
Default Somethin is just not right !

OK , here is the weirdness of the day! 2001 Amana GFA furnace. Turn thermostat on, furnace kicks on, flame looks great , blower is quiet, everything seems to be working fine. So I walk around to check air flow from the vents and guess what? Heated air is coming from the cold air returns and the floor registers are sucking air back to the furnace ! These people have been living in this house for 9 years with the furnace working backwards!

Question: What would cause this?(I know it's not my job as an Inspector to determine cause, I just would like to know). Could the blower be wired wrong and running in reverse? This is the first time I've come across something like this.



Rick Slocum
NACHI # 04072697
Whitewood , SD 57793
ABSOLUTE Home Inspection Service
Reply With Quote
Need a home inspection in New Mexico? Check out InterNACHI's listing of New Mexico certified home inspectors. Or, find a home inspector anywhere in the world with our inspection search engine.
  #2  
Old 4/17/10, 6:32 PM
Jeffrey R. Jonas's Avatar
Jeffrey R. Jonas Jeffrey R. Jonas is online now
Certified Professional Inspector (CPI) ®
 
Join Date: Feb 2007
Location: Minnesota & Northern Iowa
Posts: 29,494
Default Re: Somethin is just not right !

Did you check the air flow at the filter to confirm it is a blower issue, and not a screwed up duct install?



Jeffrey R. Jonas
Owatonna, Minnesota



"I am not a teacher, but an awakener."
- Robert Frost, American poet (1874-1963).

"We Respect Our Clients Right to Privacy"

Reply With Quote
  #3  
Old 4/17/10, 6:45 PM
Larry Kage, CMI Larry Kage, CMI is offline
Certified Master Inspector ®
 
Join Date: Jul 2004
Location: NW, MI
Posts: 16,306
Default Re: Somethin is just not right !

Quote:
Originally Posted by jjonas View Post
Did you check the air flow at the filter to confirm it is a blower issue, and not a screwed up duct install?
If you do what Jeff asked about, then you'll have a better idea what's going on.

Otherwise, it is hard to tell without more info.




Awards Committee Member
SUBMIT YOUR AWARD NOMINATIONS HERE:
http://co.nachi.org/inachiawards/

The InterNACHI Awards Committee is the final authority of issuance of any award the committee offers.
____________________________________________

Larry Kage, CMI 2004-2017
State Licensed Builder since 1973
InterNACHI Lifetime Member
~retired~

The above post represents my personal opinion.
Reply With Quote
  #4  
Old 4/17/10, 6:55 PM
Richard D. Slocum's Avatar
Richard D. Slocum Richard D. Slocum is offline
Certified Professional Inspector (CPI)
 
Join Date: Jul 2004
Location: Whitewood ,SD 57793
Posts: 236
Default Re: Somethin is just not right !

It is a Horizontal draft furnace in a crawl space. My original thought was that they have the duct work installed wrong(reversed)! But then I thought, how could they(HVAC contractor) screw that up and not notice it! Oh well , it's been called out and the HAVC guy can figure it out.

Thanks guys!



Rick Slocum
NACHI # 04072697
Whitewood , SD 57793
ABSOLUTE Home Inspection Service
Reply With Quote
  #5  
Old 4/17/10, 6:56 PM
David A. Andersen, TN HI# 40's Avatar
David A. Andersen, TN HI# 40 David A. Andersen, TN HI# 40 is offline
Certified Professional Inspector (CPI) ®
 
Join Date: Jun 2005
Location: Nashville, TN
Posts: 10,275
Default Re: Somethin is just not right !

If they replaced the blower motor and wired it to run backwards, there will be little or no reversed air flow.

The motor direction can be reversed with two wires.

I'll put my money on the duct is switched.

Is this a packaged or split system?



"working together to get-IR-done" Chris Walsh
Bracebridge, Ontario:


David A. Andersen & Associates
Clarksville - Nashville Home Inspector Lic#40
http://www.midtninspections.com
ITC Level III Thermographer Cert#1958
Building Science Thermographer Cert#33784
http://www.thermalimagingscan.com
HVAC Certification EPA Cert#2046620
BPI# 5015804
Link to my Website at: http://www.midtninspections.com/link-submission
Reply With Quote
  #6  
Old 4/17/10, 7:12 PM
Richard D. Slocum's Avatar
Richard D. Slocum Richard D. Slocum is offline
Certified Professional Inspector (CPI)
 
Join Date: Jul 2004
Location: Whitewood ,SD 57793
Posts: 236
Default Re: Somethin is just not right !

Yeah , your right about the blower. The way the fins are configured there wouldn't be much air flow. It is a packaged system. I'm thinkin the ducts are switched. Thanks David !



Rick Slocum
NACHI # 04072697
Whitewood , SD 57793
ABSOLUTE Home Inspection Service
Reply With Quote
  #7  
Old 4/17/10, 7:37 PM
David A. Andersen, TN HI# 40's Avatar
David A. Andersen, TN HI# 40 David A. Andersen, TN HI# 40 is offline
Certified Professional Inspector (CPI) ®
 
Join Date: Jun 2005
Location: Nashville, TN
Posts: 10,275
Default Re: Somethin is just not right !

That is the first question we must ask when changing out a pkg hvac unit? What side is the supply?

If it is not on the same side: is there room for a transition?



"working together to get-IR-done" Chris Walsh
Bracebridge, Ontario:


David A. Andersen & Associates
Clarksville - Nashville Home Inspector Lic#40
http://www.midtninspections.com
ITC Level III Thermographer Cert#1958
Building Science Thermographer Cert#33784
http://www.thermalimagingscan.com
HVAC Certification EPA Cert#2046620
BPI# 5015804
Link to my Website at: http://www.midtninspections.com/link-submission
Reply With Quote
Reply

Thread Tools

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Somethin seems worng of missing? bkelly2 Interior Inspections 16 5/18/09 6:52 PM

All times are GMT -4. The time now is 12:56 AM.
no new posts