DCSportbikes.net  
» Help Support .NET!
DCSportbikes Premier Membership for 25$ per year. Discounts! Click here for full information.

Now available in the .NET Shop:



Get your DCSBN Gear!
» Shoutbox
Sorry, only registered users have the ability to use our real-time shoutbox to chat with other members.

Register now, it's free!
» Online Users: 539
1 members and 538 guests
GRN96WS6
Most users ever online was 4,519, September 2, 2015 at 03:26 AM.
Go Back   DCSportbikes.net > Non-Sportbike Forums > Non-Sportbike Chat

Reply
LinkBack Thread Tools
HVAC question (furnace pressure switch)
Unread
  (#1)
Playing in the dirt
 
jar944's Avatar
 
Posts: 2,171
Join Date: June 8, 2008
Location: South Riding
HVAC question (furnace pressure switch) - October 9, 2012, 07:24 AM

(80% NG furnace)

Can someone tell me how much vacuum the pressure switch should be seeing.

The inducer doesn't seem to be pulling much vacuum, but I don't know what it should measure.


KTMs and Yamahas
  Send a message via AIM to  
Reply With Quote
Unread
  (#2)
GDMFSOB
 
The Evil Twin's Avatar
 
Posts: 4,543
Join Date: June 22, 2008
Location: North PWC
October 9, 2012, 09:34 AM

Couldn't say what it should measure per se, but I can say that often the little tube will get condensation in it. That will be enough of a blockage to prevent the switch from making. Another thing is where the tube connects to the inducer housing will get plugged with debris. Pop the tube off and stick a paper clip end up there to clear it out.
Edit: use the paper clip to clear out the nipple on the housing. Not the tube.


#132 EX
Proudly representing: DC-MOTO, Amsoil, SHOEI, Woodcraft-CFM, MARRC

2015 MARRC Crash & Burn Award
2014 MARRC Sportsmanship Award
2013 MARRC Amateur of the Year
2012 MARRC Cornerworker of the Year
www.marrc.org

Quote:
Originally Posted by Stillie View Post
Here is my anus! Deliver thy penis unto it!.
  Send a message via AIM to  
Reply With Quote
Unread
  (#3)
Playing in the dirt
 
jar944's Avatar
 
Posts: 2,171
Join Date: June 8, 2008
Location: South Riding
October 9, 2012, 10:39 AM

Quote:
Originally Posted by The Evil Twin View Post
Couldn't say what it should measure per se, but I can say that often the little tube will get condensation in it. That will be enough of a blockage to prevent the switch from making. Another thing is where the tube connects to the inducer housing will get plugged with debris. Pop the tube off and stick a paper clip end up there to clear it out.
Edit: use the paper clip to clear out the nipple on the housing. Not the tube.
Thanks for the tip, but both the port and the tube are clear of debris.

I've seen some references to 3" of water, I guess I really need to look over the switch for specs.


KTMs and Yamahas
  Send a message via AIM to  
Reply With Quote
Unread
  (#4)
Playing in the dirt
 
jar944's Avatar
 
Posts: 2,171
Join Date: June 8, 2008
Location: South Riding
October 9, 2012, 04:59 PM

The switch is rated for .52 wc I was only pulling .4

The vent inst clogged as I had the same reading w/ or w/o it connected.

cracked manifold?


KTMs and Yamahas
  Send a message via AIM to  
Reply With Quote
Unread
  (#5)
Playing in the dirt
 
jar944's Avatar
 
Posts: 2,171
Join Date: June 8, 2008
Location: South Riding
October 9, 2012, 08:08 PM

Pulled the inducer, looks like the hvac installers used the open vent as a garbage can when they put the new air cond in this summer.

the culprit:


removed the gasket/sealant "turd" and it pulled .54"

THIS IS EXACTLY WHY I NEVER HAVE ANYONE "SERVICE" ANYTHING I OWN...


KTMs and Yamahas

Last edited by jar944; October 9, 2012 at 08:11 PM..
  Send a message via AIM to  
Reply With Quote
Unread
  (#6)
GDMFSOB
 
The Evil Twin's Avatar
 
Posts: 4,543
Join Date: June 22, 2008
Location: North PWC
October 9, 2012, 08:10 PM

deleted
Damn! That was plugging the flue vent??


#132 EX
Proudly representing: DC-MOTO, Amsoil, SHOEI, Woodcraft-CFM, MARRC

2015 MARRC Crash & Burn Award
2014 MARRC Sportsmanship Award
2013 MARRC Amateur of the Year
2012 MARRC Cornerworker of the Year
www.marrc.org

Quote:
Originally Posted by Stillie View Post
Here is my anus! Deliver thy penis unto it!.
  Send a message via AIM to  
Reply With Quote
Unread
  (#7)
GDMFSOB
 
The Evil Twin's Avatar
 
Posts: 4,543
Join Date: June 22, 2008
Location: North PWC
October 9, 2012, 08:12 PM

Or was it in the housing?


#132 EX
Proudly representing: DC-MOTO, Amsoil, SHOEI, Woodcraft-CFM, MARRC

2015 MARRC Crash & Burn Award
2014 MARRC Sportsmanship Award
2013 MARRC Amateur of the Year
2012 MARRC Cornerworker of the Year
www.marrc.org

Quote:
Originally Posted by Stillie View Post
Here is my anus! Deliver thy penis unto it!.
  Send a message via AIM to  
Reply With Quote
Unread
  (#8)
Playing in the dirt
 
jar944's Avatar
 
Posts: 2,171
Join Date: June 8, 2008
Location: South Riding
October 9, 2012, 08:37 PM

Quote:
Originally Posted by The Evil Twin View Post
Or was it in the housing?
It was in the fan housing.


KTMs and Yamahas
  Send a message via AIM to  
Reply With Quote
Unread
  (#9)
GDMFSOB
 
The Evil Twin's Avatar
 
Posts: 4,543
Join Date: June 22, 2008
Location: North PWC
October 9, 2012, 09:03 PM

Quote:
Originally Posted by jar944 View Post
It was in the fan housing.
Good on ya for digging in. I'd say "unbelievable" but I guess not. *shakes head, walks away*


#132 EX
Proudly representing: DC-MOTO, Amsoil, SHOEI, Woodcraft-CFM, MARRC

2015 MARRC Crash & Burn Award
2014 MARRC Sportsmanship Award
2013 MARRC Amateur of the Year
2012 MARRC Cornerworker of the Year
www.marrc.org

Quote:
Originally Posted by Stillie View Post
Here is my anus! Deliver thy penis unto it!.
  Send a message via AIM to  
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
Trackbacks are On
Pingbacks are On
Refbacks are On


Powered by vBadvanced CMPS v3.2.3


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Friendly URLs by vBSEO 3.6.0
vBulletin Skin developed by: vBStyles.com
All logos and trademarks in this site are property of their respective owner. The comments are property of their posters, all the rest 2002-2010 by DCSportbikes.net. DCSportbikes.net is owned by End of Time Studios, LLC.