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Old 05-06-2008, 08:47 AM   #1
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1971 31' Sovereign
sautee nacoochee , Georgia
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HELP, On Armstrong AC Thermostat

HI,
I have a 1971 Airstream Sovereign with the original Armstron AC, model no TR21-12. I am replacing the original thermostat. The new one I bought is a white rodgers. The white rodgers thermostat has terminal that have designators such as w,rc,rch, b,y,etc. My rv has a brown,black,red,and green wire. I do not have a clue on which terminals to connect these 4 wires to. Can anybody help me on this? Thanks for your time.
Matt
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Old 05-06-2008, 08:49 AM   #2
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1993 21' Sovereign
Colfax , North Carolina
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Quote:
Originally Posted by mburgess1431
HI,
I have a 1971 Airstream Sovereign with the original Armstron AC, model no TR21-12. I am replacing the original thermostat. The new one I bought is a white rodgers. The white rodgers thermostat has terminal that have designators such as w,rc,rch, b,y,etc. My rv has a brown,black,red,and green wire. I do not have a clue on which terminals to connect these 4 wires to. Can anybody help me on this? Thanks for your time.
Matt
Welcome to the forums.
If you can wait until tonight, I can take a photo of our thermostat, with the wire colors visible and the connectors labeled.
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Old 05-06-2008, 09:11 AM   #3
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1971 31' Sovereign
sautee nacoochee , Georgia
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Thanks

Terry,
That would be awesome. This thing has me at the end of my rope. Thanks so much. Matt
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Old 05-06-2008, 12:13 PM   #4
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1993 21' Sovereign
Colfax , North Carolina
Join Date: Jun 2003
Posts: 20,193
Quote:
Originally Posted by mburgess1431
Terry,
That would be awesome. This thing has me at the end of my rope. Thanks so much. Matt
Strangely enough, I have a photo of it opn my cell phone at work. The colors and letters are as follows, I can still post a photo if needed:
G= black
W= not used
Y= brown
Rh= larger red
Rc= smaller red
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Old 05-06-2008, 12:59 PM   #5
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1971 31' Sovereign
sautee nacoochee , Georgia
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Thanks

Terry,
Wow and thanks. Did yours have a green wire? Im assuming you had two red wires? Thanks
Matt
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Old 05-07-2008, 07:07 AM   #6
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1971 31' Sovereign
sautee nacoochee , Georgia
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AC Wiring

Terry,

If it isn't too inconvenient,can I take you up on the picture. I hate to have to ask,but just really struggling with this thing and I have to have it finished by Thursday night.
Thanks Again
Matt
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Old 05-07-2008, 07:13 AM   #7
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1993 21' Sovereign
Colfax , North Carolina
Join Date: Jun 2003
Posts: 20,193
Quote:
Originally Posted by mburgess1431
Terry,

If it isn't too inconvenient,can I take you up on the picture. I hate to have to ask,but just really struggling with this thing and I have to have it finished by Thursday night.
Thanks Again
Matt
I knew I should have gone ahead and snapped a photo of it last night. I'll post a pic tonight.
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Old 08-27-2012, 02:07 AM   #8
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1972 27' Overlander
College Station , Texas
Join Date: Aug 2012
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Originally Posted by overlander63 View Post
Strangely enough, I have a photo of it opn my cell phone at work. The colors and letters are as follows, I can still post a photo if needed:
G= black
W= not used
Y= brown
Rh= larger red
Rc= smaller red
I am so glad I found this post. We purchased our '72 Overlander 8 days ago and the A/C thermostat was not hooked up. The guy said he had been using a portable unit inside and hooked it up to a replacement thermostat. I thought we were taken advantage of until I got the right combo that you provided here. It will be much easier to get in it and work in this Texas heat now that it will be cooling.
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