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09-18-2015, 05:24 PM
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#1
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Member
Join Date: Sep 2015
Location: Wyoming
Posts: 79
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2007 Alpine Duo-Therm and Suburban Furnace
We just purchased a 2007 Alpine Coach. We are quite happy with it thus far! Our question is this: it has the Dometic DuoTherm AC/Heat Pump. The thermostat control shows these two items, but it does not show "furnace." There IS a suburban furnace in the coach. We have been unable to locate a thermostat or any way to turn on/activate the furnace. Is there a wire missing? Fuse? Has it just not been connected to the Dometic system? Any troubleshooting ideas or help with this is appreciated.
Thanks!
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09-18-2015, 05:26 PM
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#2
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Senior Member
Commercial Member
Join Date: Aug 2012
Posts: 726
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If you could post a picture of the thermostat, that would help.
Sent from my iPad using iRV2 - RV Forum
TravellingRVDoctor, LLC
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09-18-2015, 05:36 PM
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#3
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Senior Member
Newmar Owners Club Spartan Chassis
Join Date: Oct 2010
Location: Lake Havasu City, AZ
Posts: 1,715
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Quote:
Originally Posted by ladytj1754
We just purchased a 2007 Alpine Coach. We are quite happy with it thus far! Our question is this: it has the Dometic DuoTherm AC/Heat Pump. The thermostat control shows these two items, but it does not show "furnace." There IS a suburban furnace in the coach. We have been unable to locate a thermostat or any way to turn on/activate the furnace. Is there a wire missing? Fuse? Has it just not been connected to the Dometic system? Any troubleshooting ideas or help with this is appreciated.
Thanks!
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So as you cycle through the mode button on the thermostat, you only see 'Cool' and 'Heat'? No 'Furnace' option?
This post may be helpful... http://www.irv2.com/forums/f104/1999...ce-229777.html
__________________
2019 Newmar Dutch Star 4328 K2
2017 Grand Cherokee Summit 5.7
2008 Beaver Contessa 40' Pacifica 425 Cat
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09-18-2015, 05:47 PM
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#4
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Member
Join Date: Sep 2015
Location: Wyoming
Posts: 79
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Yes, the thermostat only shows "cool" and "heat" no furnace. I'll look at the link provided to see if I can troubleshoot further. If there are any other suggestions, please forward. Thanks!
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09-18-2015, 05:57 PM
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#5
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Senior Member
Join Date: Dec 2012
Posts: 509
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I have an Alpine Coach but it does not have the heat pump. I did have another motorhome that did have the heat pump. IIRC when you want heat you set the thermostat to the temp you want and the control to "Heat" ....if the furnace is needed to augment the heat pump it will turn on automatically and if it is not needed only the heat pump will function.
Geoff
__________________
2000 Alpine 38 FDS
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09-18-2015, 06:36 PM
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#6
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Member
Join Date: Sep 2015
Location: Wyoming
Posts: 79
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Picture of the thermostat
Here is a photo of the thermostat in our 2007 Alpine coach. According to the documentation that came with the coach, we should be able to cycle through the modes from "cool" to "Heat" to "furnace". We thought there was no furnace, but checked and there is a Suburban furnace located in the basement of the coach. But "furnace" isn't an option on the mode cycle. I'm wondering if it was never hooked up, or there is a missing fuse, or something...
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09-18-2015, 07:35 PM
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#7
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Senior Member
Join Date: Nov 2005
Posts: 7,400
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Furnace is controlled by zone 1 only [zone 1 is the front heat pump of the coach, while zone 2 is the bedroom heat pump]--you dont get a furnace option when you toggle thru the modes while on zone 1????
__________________
Old Scout
2015 IH45 Foretravel
2003 Alpine 40' MDTS [Sold]
New Braunfels, Texas
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09-19-2015, 06:21 AM
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#8
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Member
Join Date: Sep 2015
Location: Wyoming
Posts: 79
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Reply to Old Scout
Do not see the furnace option on Zone 1. Will check again, though. We are wondering if there is a switch or something that needs to be activated to get the furnace to work. Or maybe a fuse is out. Would that cause the problem? Will have to see if we can figure out the fuse panel.
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09-19-2015, 06:29 AM
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#9
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Senior Member
Join Date: Nov 2005
Posts: 7,400
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Any chance the front heat pump was replaced or worked on recently? There are dip-switch settings on each pump [under the shroud, up on the roof] to "program" the relationship between the two pumps, and to control the furnace from the front zone??? There is also a way to reset/restore the default settings on the t-stat. Involves turning off the t-stat, then holding down two of the buttons--mode and zone, or up/down, I think but someone will have to confirm this.....
__________________
Old Scout
2015 IH45 Foretravel
2003 Alpine 40' MDTS [Sold]
New Braunfels, Texas
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09-19-2015, 07:48 AM
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#11
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Member
Join Date: Sep 2015
Location: Wyoming
Posts: 79
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Reply to Old Scout
Actually, that may have happened. When I picked up the coach in Salem, OR, they had just re-installed the generator because they said the air conditioner didn't would start and turn off with the generator running. I brought it home to Wyoming and it will go to Colorado Monday to Cummins Coach Care to have that issue looked at. Not sure the problem there. The dash air doesn't work either. These seem to be the only problems with the coach. I just thought there might be some easy fix that had been discussed here. I've sent our application in for membership in the ACA so I'm hoping we can learn more from the group as well. We went from a Tiffin product to this. More bells and whistles with this coach!
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09-19-2015, 07:54 AM
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#12
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Member
Join Date: Sep 2015
Location: Wyoming
Posts: 79
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Is there documentation that says what the dip switches are to be set at?
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09-19-2015, 08:48 AM
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#13
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Member
Join Date: Sep 2015
Location: Wyoming
Posts: 79
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Thanks for all the help/suggestions! Setting the zone to "1" and cycling through the modes found the furnace! Too bad there's no documentation indicating this! Oh well, now we know!
Thank you SO much!
Jim and Marilyn
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09-19-2015, 08:49 AM
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#14
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Senior Member
Alpine Owners Club
Join Date: Mar 2009
Location: Surprise, AZ
Posts: 836
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There is a manual for the thermostat control that you can download from Dometic.
__________________
Bob Bowers (Surprise, AZ)
2003 Alpine Coach 40' FDTS
2014 Jeep Cherokee Lattitude
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