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11-21-2018, 10:28 AM
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#1
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Junior Member
Join Date: Nov 2018
Posts: 5
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No power to my thermostat
I have a 89 monarch dynasty and I have no power to the duo therm thermostat, everything was working just fine and now nothing, I have checked the breaker box and checked everything I can see, does anyone know if there are other fuses or something to help guide me to get this figured out and where there located?
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11-21-2018, 11:51 AM
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#2
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Registered User
Winnebago Owners Club
Join Date: Feb 2018
Posts: 1,336
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There may be a breaker or reset button on the furnace box. What is the charge level of the batteries?
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11-21-2018, 12:48 PM
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#3
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Junior Member
Join Date: Nov 2018
Posts: 5
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Not sure about that it’s my mom and dads RV and I’m just trying to help them get it figured out, they are in Vegas and I’m in indiana
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11-21-2018, 01:12 PM
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#4
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Senior Member/RVM #90
Monaco Owners Club
Join Date: Nov 2002
Location: Columbus, MS
Posts: 54,768
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Hi !  Welcome to IRV2! We're sure glad you joined the gang! 
It may help if you can tell use which thermostat you have or maybe post a pic of it.
Good luck, happy trails, and God bless!  
__________________
Joe & Annette
Sometimes I sits and thinks, sometimes I just sits.....
2002 Monaco Windsor 40PBT, 2013 Honda CRV AWD
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11-21-2018, 01:16 PM
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#5
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Senior Member
Join Date: Jul 2014
Posts: 35,417
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The heat runs on 12 volts. Make sure the battery disconnect is on and check for fuses, not breakers for the heater.
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11-21-2018, 01:25 PM
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#6
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Senior Member
Join Date: Jun 2016
Location: Minden nevada
Posts: 737
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At some point in time du therm had a small glass fuse in the a/c panel box inside The a/c cover on the roof. My 2002 has this fuse my old motor home had a 1984 du therm and it didn’t have a fuse in the unit.
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2002 country coach allure 32 foot dual slide 350 cummins ISC
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11-21-2018, 01:29 PM
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#7
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Senior Member
Winnebago Owners Club
Join Date: Dec 2015
Location: Jacksonville, Fl
Posts: 3,542
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Does anything 12 volt inside work?
Lights? Fridge?
The thermostat requires 12 volts to it, not 120.
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2013 Winnebago Sightseer 36V
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11-21-2018, 07:58 PM
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#8
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Junior Member
Join Date: Nov 2018
Posts: 5
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Yes the fridge works, all the lights work
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11-21-2018, 08:00 PM
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#9
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Junior Member
Join Date: Nov 2018
Posts: 5
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They have checked all the fuses including the ones on top they have even installed a new thermostat but still no power
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11-21-2018, 08:12 PM
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#10
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Senior Member
Join Date: Mar 2015
Posts: 2,984
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So, there is no power going into the thermostat? I am confused because if the thermostat is not getting power, why would they install a new thermostat? If there is power going into the thermostat, where are they checking to see if there is power coming out, at the thermostat itself?
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'04 Newmar Mountain Aire 4016
400ISL/Freightliner
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11-21-2018, 08:19 PM
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#11
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Junior Member
Join Date: Nov 2018
Posts: 5
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They thought that maybe here was a bad switch or something so they tried it but it still didn’t work
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11-21-2018, 08:30 PM
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#12
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Senior Member
Join Date: Nov 2012
Posts: 274
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Quote:
Originally Posted by Jhooten1
They thought that maybe here was a bad switch or something so they tried it but it still didn’t work
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If memory serves me, There is no power going to that switch, It only opens and closes the contacts from the heater, I would be looking for blown heater fuse, on the heater and in fuse panel. Maybe an in line on the heater itself.
Terry.
__________________
Reno, Nv
2006 Monaco Diplomat PAQ
Jeep Grand Cherokee & Wrangler Toads
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11-21-2018, 10:52 PM
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#13
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Senior Member
Join Date: Jun 2016
Location: Minden nevada
Posts: 737
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If we are talking about a stand alone heater did you consider jumping the 2 wires in the heater that run to the thermostat? I believe they are blue in color you could have a bad or broken wire connection between the heater and thermostat happened to me a busy mouse?
__________________
2002 country coach allure 32 foot dual slide 350 cummins ISC
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