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08-23-2010, 12:56 PM
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#1
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3 Rivet Member 
2000 23' Safari
Vero Beach
, Florida
Join Date: Jul 2010
Posts: 180
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Replace furnace thermostat with digital
Has anyone replaced the original analog furnace thermostat with a digital model? The book that came with the original furnace says to use an analog thermostat but I can't imagine why. Thanks!
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08-23-2010, 01:03 PM
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#2
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Master of Universe
2008 25' Safari FB SE
Grand Junction
, Colorado
Join Date: Sep 2007
Posts: 12,079
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Mine came with the digital thermostat, so I guess they went to them in 2008. The wiring for the digital one may be different. It doesn't seem to have a battery—I haven't really looked—so it would need power from the 12 v. system, but an analog one would only close a circuit and not need independent power. Or, your book may simply reflect they hadn't thought about it until later. Call the A/C people (probably Dometic) and ask them what to do.
I think it's a good change because the digital one will automatically switch from heat pump to furnace when it gets several degrees below freezing.
Gene
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08-23-2010, 01:05 PM
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#3
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Rivet Master 
1969 31' Sovereign
Broken Arrow
, Oklahoma
Join Date: Jan 2003
Posts: 1,455
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I replaced mine with a 12VDC but don't remember what I used this is what I copied from another post.
"Tmstat is Hunter Model 42999B digital also can use RiteTemp electronic thermostats model 6020 "Universal" from Home Depot".
__________________
Garry
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08-23-2010, 01:41 PM
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#4
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Rivet Master 

1961 24' Tradewind
1969 29' Ambassador
1970 21' Globetrotter
Jamestown
, Tennessee
Join Date: Jul 2008
Posts: 1,783
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I am using a low end digital thermostat on my 61, works with both the original milivolt furnace and the air conditioner. I did add a seperate switch in a closet to switch between high and low fan speed on the AC.
It was a Hunter thermostat but don't know the model. Came from Lowes for around $20.
__________________
Rick Davis 1602 K8DOC
61 tradewind, plus a few others
13 Ram 2500 TD
99 Dodge TD 577K miles
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08-23-2010, 01:47 PM
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#5
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Rivet Master 
1971 25' Tradewind
1993 34' Excella
Currently Looking...
Estancia
, New Mexico
Join Date: Feb 2005
Posts: 7,587
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I replaced mine with a cheap thermostat from W'mart. Get one you can program the on /off temperature. Does not matter if it says for 24v systems. It will work on 12.
__________________
Sail on silver girl. Sail on by. Your time has come to shine.
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08-23-2010, 01:57 PM
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#6
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Rivet Master 

1999 28' Excella
Frederick
, Maryland
Join Date: Mar 2004
Posts: 739
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Hunter from Wally World in my 1999 Safari. Works much better than the el-cheapo Atwood that come with it. Easy mod, just match the wire colors.
__________________
1999 28' Safari
2012 F150 Platinum Max Tow 7650 GVWR 3.73 Elec. Locking Diff.(Prev 2003 Dmax).
Honda EU2000i, Equalizer Hitch
AM Solar Panels 150W - 2 Trojan T 105 6V Batteries
KC3MAP
On internet forums, please research and separate the wheat from the chaff (including mine!)
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08-23-2010, 02:27 PM
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#7
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3 Rivet Member 
2000 23' Safari
Vero Beach
, Florida
Join Date: Jul 2010
Posts: 180
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Thanks for everybodys advice! Seems like I always get my answer here!
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08-23-2010, 02:32 PM
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#8
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Rivet Master 
2012 25' Flying Cloud
Battle Lake
, Minnesota
Join Date: Jun 2009
Posts: 7,716
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My 2007 Safari 20 SE mfg date March 2007 came with a digital thermostat. Is yours an SE model, if that makes a difference?
Doug
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08-23-2010, 06:14 PM
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#9
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3 Rivet Member 
2000 23' Safari
Vero Beach
, Florida
Join Date: Jul 2010
Posts: 180
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It is not an SE nor is it really a 2007! I know the profile says 2007 but if you choose 2006 the list doesn't show a 20' Safari, so I took the liberty of fudging up a year! So now the truth comes out! Maybe they changed in 2007.
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08-23-2010, 08:13 PM
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#10
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Rivet Master 
1971 25' Tradewind
1993 34' Excella
Currently Looking...
Estancia
, New Mexico
Join Date: Feb 2005
Posts: 7,587
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Quote:
Originally Posted by Soyboy
Hunter from Wally World in my 1999 Safari. Works much better than the el-cheapo Atwood that come with it. Easy mod, just match the wire colors.
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There is should only be 2 wires to hook up. The polarity does not matter so you can't go wrong.
__________________
Sail on silver girl. Sail on by. Your time has come to shine.
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07-18-2012, 07:04 PM
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#11
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Rivet Master 

2006 25' Safari
St. Augustine
, Florida
Join Date: Oct 2011
Posts: 2,531
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This is an older thread but I will add that I have a 2006 that HAD an Atwood manual furnace control that I recently replaced with a Hunter 42999B model for $20 from Walmart. Basically it is a universal unit with a milliwatt to 120volt range and can be used on various systems. The furnace only hookup is 2-wire. Basically you take the old one off and install the new one. There is already a jumper wire for two-wire systems so it only needs hooked to the wires and batteries added. I also noticed that Filtrete has a multi-use model and also Honeywell (low voltage).
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03-04-2015, 10:02 AM
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#12
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1 Rivet Member 
1975 31' Sovereign
san Antonio
, Texas
Join Date: Dec 2014
Posts: 19
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extra wire?
So I bought a thermostat from Lowe's, one that runs off batteries. However when I connected it to the new thermostat I had a wire left over from the old thermostat labeled G2. What does this wire go to?
Thanks!
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03-04-2015, 10:49 AM
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#13
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Wise Elder
2010 30' Classic
Vintage Kin Owner
South of the river
, Minnesota
Join Date: Dec 2009
Posts: 4,169
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That is a wire for controlling the fan speed.
If you want to retain control of the fan speed, you'll have to install a separate switch to do so, as RickDavis (up thread) has done.
You would need an SPDT (3 way) switch, with the center contact connected to the G terminal on the thermostat, and the other terminals connected to the G and G2 wires.
__________________
To learn to see below the surface, you must adjust your altitude
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03-04-2015, 11:41 AM
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#14
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Rivet Master 

2000 25' Safari
1999 34' Excella
Davidson County
, NC Highlands County, FL
Join Date: Aug 2006
Posts: 4,336
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I replaced the furnace thermostat with a digital about 4 years ago. What I like about it is that the temperature swing between on and off is close to a 1 to 2 degrees. The interior stays much more comfortable.
The OP asked about the thermostat to control the furnace (2 wire on the 2000 Safari), not about a multi-function t-stat that controls furnace, heat pump, air conditioner, etc. The thermostat on my Safari is way different than the one on my Excella. On the Safari, the AC has it's thermostat mounted within the rooftop unit.
__________________
Alan
2014 Silverado LTZ 1500 Crew Cab 5.3L maximum trailering package
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03-04-2015, 12:35 PM
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#15
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Moderator

2004 30' Classic Slideout
Fenton
, Missouri
Join Date: Mar 2002
Posts: 9,678
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I replaced my analog thermostat on my then new 2001 Safari with a Hunter Just Right Thermostat that I picked up at Walmart for about $20.
Here's a thread I started back in 2004 where we talked about this. Bottom line it was a good move and it greatly increased our comfort level.
http://www.airforums.com/forums/f427...ostat-246.html
Jack
__________________
Jack Canavera
STL Mo.
AIR #56
'04 Classic 30' S.O.,'03 GMC Savana 2500,'14 Honda CTX 700
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