 |
|
10-28-2009, 08:15 PM
|
#16
|
|
Newbie
Join Date: Oct 2009
Posts: 16
|
Quote:
Originally Posted by yuri
The one above the burners and pushes the smoke to the chimney.
|
Yep, that one works.
I thought it was called in inducer fan - is it not?
Edit: although it does run, it only stays on for a few minutes after the furnace attempts to start.
|
|
|
Warning: The topics covered on this site include activities in which there exists the potential for serious injury or death. DIYChatroom.com DOES NOT guarantee the accuracy or completeness of any information contained on this site. Always use proper safety precaution and reference reliable outside sources before attempting any home improvement task!
|
10-28-2009, 08:24 PM
|
#17
|
|
old pro
Join Date: Nov 2008
Location: Winnipeg, Canada
Posts: 1,663
|
ventor fan/inducer fan same fan different techs call it differently. After the ventor fan starts the pressure switch closes and then the igniter is energized. If the switch does not close then the board show an error code. Is that happening? code is on the back of one of the doors. led flashes. Remove the smokepipe from the top of the furnace and look for a dead bird. Yes, I am serious, they fall in and can block the pipe and cause a problem.
Last edited by yuri; 10-28-2009 at 08:27 PM.
|
|
|
|
|
10-28-2009, 08:34 PM
|
#18
|
|
Newbie
Join Date: Oct 2009
Posts: 16
|
Quote:
Originally Posted by yuri
ventor fan/inducer fan same fan different techs call it differently. After the ventor fan starts the pressure switch closes and then the igniter is energized. If the switch does not close then the board show an error code. Is that happening? code is on the back of one of the doors. led flashes. Remove the smokepipe from the top of the furnace and look for a dead bird. Yes, I am serious, they fall in and can block the pipe and cause a problem.
|
Just tried that - no bird, just one dead roach. The fan blades appear to be moving properly.
There is no error code, which confuses me. Because the igniter is not being energized and the gas is not being lit - I would have thought that I'd get an error code.
I did connect my multi meter to the pressure switch. The left lead reads 27v, and the right lead reads .8v.
|
|
|
|
|
10-28-2009, 08:44 PM
|
#19
|
|
old pro
Join Date: Nov 2008
Location: Winnipeg, Canada
Posts: 1,663
|
You probably have a bad circuit board. It definetley should show you an open pressure switch code. Try cozyparts.com for Lennox parts or a Lennox dealer.
|
|
|
|
|
10-28-2009, 08:51 PM
|
#20
|
|
Newbie
Join Date: Oct 2009
Posts: 16
|
Quote:
Originally Posted by yuri
You probably have a bad circuit board. It definetley should show you an open pressure switch code. Try cozyparts.com for Lennox parts or a Lennox dealer.
|
Is there a way I can test the board to confirm its bad before I buy a new one?
|
|
|
|
|
10-28-2009, 09:07 PM
|
#21
|
|
old pro
Join Date: Nov 2008
Location: Winnipeg, Canada
Posts: 1,663
|
Nope. All the codes should be on the sticker and they never fail to show up on a board. Especially the pressure switch code.
|
|
|
|
|
10-30-2009, 12:24 AM
|
#22
|
|
Newbie
Join Date: Oct 2009
Posts: 16
|
Fixed!
I went to the supply house to get a new tube...they didn't have the exact tube that I broke, just a generic one that wasn't nearly as stiff and had a larger interior diameter.
I had a guy come over to look at it tonight. Before I put the new tube on he had me run a wire into the inducer fan....guess there had to have been something tiny plugging it up. I didn't feel or see anything, but it fired right up.
The high heat tube that Lennox used is different than the one I bought today...the one I got kinks easily and required me to reposition the pressure sensor. Stupid replacement tube from Lennox is $25!
Still baffled as to why I never got any trouble codes.
|
|
|
|
|
10-30-2009, 05:41 PM
|
#23
|
|
old pro
Join Date: Nov 2008
Location: Winnipeg, Canada
Posts: 1,663
|
That is very strange. Good to know in case I run into one. Probably a bad batch of boards from whomever made them.
|
|
|
|
|
10-30-2009, 06:04 PM
|
#24
|
|
Newbie
Join Date: Oct 2009
Location: Los Angeles
Posts: 21
|
What do you mean about the tube?
What kind of tube are you talking about that you replaced? I don't think i have ever heard of a high heat tube.
|
|
|
|
|
10-30-2009, 07:58 PM
|
#25
|
|
Newbie
Join Date: Oct 2009
Posts: 16
|
Quote:
Originally Posted by thehvacguy
What kind of tube are you talking about that you replaced? I don't think i have ever heard of a high heat tube.
|
The orange tube is the original one that I tore while removing. It was basically molded to fit perfectly. I replaced it with the black tubing, but it isn't nearly as thick and kinks easily. I had to move the pressure sensor to make it work, and I'm worried that it will melt as I don't know if it can withstand the heat.
I'll spend $25 if I have to...but can you get a replacement somewhere else? $25 from cozyparts just seemed pretty high for a little piece of rubber.
|
|
|
|
|
10-30-2009, 08:05 PM
|
#26
|
|
old pro
Join Date: Nov 2008
Location: Winnipeg, Canada
Posts: 1,663
|
It is SILICONE hose and not rubber and the stuff costs me about $10/foot. Buy it or it will melt. Too bad you don't live nearby, I have lots of those leftover from other jobs. 
|
|
|
|
|
10-30-2009, 08:22 PM
|
#27
|
|
Newbie
Join Date: Oct 2009
Posts: 16
|
Any place I can buy something similar? Like an autoparts store?
Any chance you want to ship me a piece? 
|
|
|
|
|
10-30-2009, 08:22 PM
|
#28
|
|
Newbie
Join Date: Oct 2009
Location: Los Angeles
Posts: 21
|
So pretty much the tube allows the heat from the vent to flow to a limit switch?
|
|
|
|
|
10-30-2009, 08:24 PM
|
#29
|
|
old pro
Join Date: Nov 2008
Location: Winnipeg, Canada
Posts: 1,663
|
If it is the right diameter and made from silicone it will work. The Lennox one is better because of the square shape/prevents kinky/kinking.LOL. 
The tube goes to a pressure switch which proves the ventor fan is running by the vacuum the fan draws.
|
|
|
|
|
10-30-2009, 08:29 PM
|
#30
|
|
Newbie
Join Date: Oct 2009
Location: Los Angeles
Posts: 21
|
The pressure switch is normally open or normally closed?
|
|
|
|
| Thread Tools |
Search this Thread |
|
|
|
| Display Modes |
 Linear Mode
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
|
