Reply
 
Thread Tools Search this Thread Display Modes
 
Old 03-03-2010, 09:10 AM   #15
Rivet Master
 
Lumatic's Avatar

 
1971 25' Tradewind
1993 34' Excella
Currently Looking...
Estancia , New Mexico
Join Date: Feb 2005
Posts: 6,642
Images: 16
Blog Entries: 1
Quote:
Originally Posted by Mike Leary View Post
If the furnace has to come out, you should replace the sail (limit) switch, card and motor; they will all fail, sooner than later. I'd be looking at the gas valve, too. Blow out all the feed lines with compressed air, also. Since misery loves company, I've, since 01, replaced the heater motor three times, the gas valve once, the electrode twice, the ignitor once and the limit switch three times. I think I've got another limit switch gone bad, the furnace will run for a few minutes then go into lockdown.
Referring to the terms above and other posts:
1. Is the "sail", "paddle" and "limit switch" the same part with different names?
2. Is the "card" and "circuit board" the same part?
3. Is the "electrode" an "igniter" the same part?

Can someone advise me on my laundry list of parts to rebuild the NT 30SP. I'm thinking sail switch, circuit board, motor, electrode at minimum. What would the parts cost? I can get a new NT30SP from Palomino for less than $400 shipping included, so I'm wondering if a rebuild is worth it?
__________________

__________________
Sail on silver girl. Sail on by. Your time has come to shine.
Lumatic is offline   Reply With Quote
Old 03-03-2010, 09:41 AM   #16
Full Timers/Diesel power.
 
Mike Leary's Avatar
 
1983 31' Airstream310
Cactus Hug , Arizona
Join Date: Mar 2007
Posts: 2,540
Images: 11
Quote:
Originally Posted by Lumatic View Post
Referring to the terms above and other posts:
1. Is the "sail", "paddle" and "limit switch" the same part with different names?
2. Is the "card" and "circuit board" the same part?
3. Is the "electrode" an "igniter" the same part?

Can someone advise me on my laundry list of parts to rebuild the NT 30SP. I'm thinking sail switch, circuit board, motor, electrode at minimum. What would the parts cost? I can get a new NT30SP from Palomino for less than $400 shipping included, so I'm wondering if a rebuild is worth it?
My guys call it a "limit switch", I'm not sure about the other two terms. Questions 2 & 3, the answer is "yes". A new motor is around $130.00, the limit switch is cheap, around $15.00, a gas valve is around $100.00, a card is $100, also. I think I'd buy a fresh furnace, that way you'll have warranty.
__________________

__________________
"A settled wisdom, plus the itch to be elsewhere"
Mike Leary is offline   Reply With Quote
Old 03-03-2010, 10:51 AM   #17
Rivet Master
 
Lumatic's Avatar

 
1971 25' Tradewind
1993 34' Excella
Currently Looking...
Estancia , New Mexico
Join Date: Feb 2005
Posts: 6,642
Images: 16
Blog Entries: 1
Quote:
Originally Posted by Mike Leary View Post
the limit switch is cheap, around $15.00,
If I am reading my diagram correctly the limit switch is in the front left lower corner of the furnace. If that is what I am looking at it is easily accessible. Do I have that right?

The electrode (igniter?) is also right in front.

I am thinking before I pull the furnace it may be worth dropping a new electrode and limit switch and see if that gets er goin. If I go through the work of pulling the furnace I will just drop a new one in.
__________________
Sail on silver girl. Sail on by. Your time has come to shine.
Lumatic is offline   Reply With Quote
Old 03-03-2010, 10:55 AM   #18
Full Timers/Diesel power.
 
Mike Leary's Avatar
 
1983 31' Airstream310
Cactus Hug , Arizona
Join Date: Mar 2007
Posts: 2,540
Images: 11
I can't get to the limit switch in my configuration, but try that if you can get to it; like I said, I've gone through a lot of them. Be sure and replace the gasket on the electrode housing. You don't need to take the entire housing apart, only the center.
__________________
"A settled wisdom, plus the itch to be elsewhere"
Mike Leary is offline   Reply With Quote
Old 03-03-2010, 02:34 PM   #19
Rivet Master
 
Lumatic's Avatar

 
1971 25' Tradewind
1993 34' Excella
Currently Looking...
Estancia , New Mexico
Join Date: Feb 2005
Posts: 6,642
Images: 16
Blog Entries: 1
Bad Limit Switch

I took the limit switch out and tried to start the furnace, no heat. I connected the limit switch leads with a jumper wire and voila, heat. So I guess it's a bad $15 limit switch and I can postpone the inevitable a little longer.

By the way, you can still get a NT 30 SP from Palomino for $350.
__________________
Sail on silver girl. Sail on by. Your time has come to shine.
Lumatic is offline   Reply With Quote
Old 03-03-2010, 02:57 PM   #20
Full Timers/Diesel power.
 
Mike Leary's Avatar
 
1983 31' Airstream310
Cactus Hug , Arizona
Join Date: Mar 2007
Posts: 2,540
Images: 11
Well done!
__________________
"A settled wisdom, plus the itch to be elsewhere"
Mike Leary is offline   Reply With Quote
Old 03-04-2010, 07:19 AM   #21
Single Slice
 
2004 28' Safari S/O
Livingston , Louisiana
Join Date: Oct 2009
Posts: 40
Great! The bad sail/limit switch trouble has been fixed again. Mine didn't go out all at once, so it was hard to figure out. Great job again - to the forum.
__________________
david686 is offline   Reply With Quote
Old 03-04-2010, 08:06 AM   #22
Rivet Master
 
Lumatic's Avatar

 
1971 25' Tradewind
1993 34' Excella
Currently Looking...
Estancia , New Mexico
Join Date: Feb 2005
Posts: 6,642
Images: 16
Blog Entries: 1
U learn something new every day

Quote:
Originally Posted by Mike Leary View Post
If the furnace has to come out, you should replace the sail (limit) switch
In this case the sail and limit switch are different switches. To get to the sail switch you do have to pull the furnace. On my furnace to get to the limit switch you don't. If I understand the limit switch it kicks in and turns the burner off when furnace temps reach a predetermined temperature.
__________________
Sail on silver girl. Sail on by. Your time has come to shine.
Lumatic is offline   Reply With Quote
Old 03-04-2010, 08:07 AM   #23
Full Timers/Diesel power.
 
Mike Leary's Avatar
 
1983 31' Airstream310
Cactus Hug , Arizona
Join Date: Mar 2007
Posts: 2,540
Images: 11
I wonder why I've never had the sail switch replaced, what does it do?
__________________
"A settled wisdom, plus the itch to be elsewhere"
Mike Leary is offline   Reply With Quote
Old 03-04-2010, 08:20 AM   #24
Rivet Master
 
Lumatic's Avatar

 
1971 25' Tradewind
1993 34' Excella
Currently Looking...
Estancia , New Mexico
Join Date: Feb 2005
Posts: 6,642
Images: 16
Blog Entries: 1
Quote:
Originally Posted by Mike Leary View Post
I wonder why I've never had the sail switch replaced, what does it do?
I'm not the Suburban guru, but have learned a few things in the past week. The sail switch (I think also called paddle switch) is in the path of the blower air flow. It needs a certain volume of air passing to mechanically open. It makes sure the blower is pumping enough air flow for the furnace to run properly. If there is not enough air the furnace will not fire.
__________________
Sail on silver girl. Sail on by. Your time has come to shine.
Lumatic is offline   Reply With Quote
Old 03-04-2010, 09:20 AM   #25
Single Slice
 
2004 28' Safari S/O
Livingston , Louisiana
Join Date: Oct 2009
Posts: 40
Lumatic, BINGO. Mine is called a sail switch because it has a 'paddle' set in the air flow to measure pressure to turn the burner on. Mine also has a limit switch that will turn off the furnace if the temp get to high, as in a 'run away' furnace.
__________________

__________________
david686 is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
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
Using the heat pump/heat strip instead of furnace. crazylev On The Road... 38 10-28-2016 08:58 PM
heat pump & furnace problem al66pine Furnaces, Heaters, Fireplaces & Air Conditioning 0 10-07-2009 03:04 AM
Furnace on 72 Tradewind pilot lights but no heat RichHog Furnaces, Heaters, Fireplaces & Air Conditioning 10 05-16-2009 03:33 PM
The furnace stopped working ipso_facto Furnaces, Heaters, Fireplaces & Air Conditioning 13 02-24-2006 03:04 PM
Heat Pump and Furnace Operation Cracker Water Heaters, Filters & Pumps 21 12-10-2003 04:10 PM


Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 06:58 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.

Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.