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07-15-2017, 09:50 AM
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#1
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Member
Join Date: Dec 2011
Posts: 30
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Dometic refrigerator only working on propane. Please help!
Showed up at my camper today to find my propane tank empty and my Dometic fridge RM 3962 displaying flashing LP along with 60 degrees. Changed tanks and now both the auto light and the LP light are lit still showing 60 degrees. . I believe the display should only have the auto light lit and not the LP light. . So I went ahead and turned off the LP , and once again the LP light is flashing. Can't seem to get it to run on electric. . Checked the fuse box and not showing any red lights. . What else can I do or check 
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07-15-2017, 10:15 AM
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#2
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Member
Join Date: Dec 2011
Posts: 30
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Also , I removed the panel on the outside of camper to access electrical outlet that the fridge is plugged into. Disconnected the fridge and tested the outlet. The outlet is fine. When. Fridge was disconnected from power the display on fridge did not change
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07-15-2017, 10:26 AM
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#3
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Senior Member
Join Date: Dec 2015
Location: Vermilion Parish, LOUISIANA
Posts: 330
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Quote:
Originally Posted by shawndfr
Also , I removed the panel on the outside of camper to access electrical outlet that the fridge is plugged into. Disconnected the fridge and tested the outlet. The outlet is fine. When. Fridge was disconnected from power the display on fridge did not change
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are you saying the display is reading when the fridge is unplugged from main source? if so then it appears the controls are powered elsewhere.
what happens when you turn off the fridge at the display with the on/off button? with or without unplugging the fridge at outside plug?
i would also say consider turning off the battery supply switch if you have one.
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the faulks & prince
2012 Nissan Titan CC
Roadmaster Active Suspension, Firestone Airbags
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2015 Puma 253FBS (sold)
2013 BMW R1200GSW
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07-15-2017, 10:27 AM
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#4
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Senior Member
Join Date: Oct 2010
Location: Lodi CA
Posts: 1,211
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Controls are 12v DC so that is possibly why? There are fuses for the low voltage under the black plastic cover in back where you unplugged it if similar to mine.
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2011 25 RL Wildcat
former fiver 1976 Fourwinds had for 35 years
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07-15-2017, 10:30 AM
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#5
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Member
Join Date: Dec 2011
Posts: 30
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Do you think one of the fuses in the back need to be replaced?
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07-15-2017, 10:33 AM
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#6
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Member
Join Date: Dec 2011
Posts: 30
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I just opened it up. 
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07-15-2017, 11:05 AM
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#7
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Member
Join Date: Dec 2011
Posts: 30
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Pulled the fuses out. They both look good
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07-15-2017, 11:10 AM
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#8
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Member
Join Date: Dec 2011
Posts: 30
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Quote:
Originally Posted by tmfaulksr
are you saying the display is reading when the fridge is unplugged from main source? if so then it appears the controls are powered elsewhere.
what happens when you turn off the fridge at the display with the on/off button? with or without unplugging the fridge at outside plug?
i would also say consider turning off the battery supply switch if you have one.
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When unplugging the power chord from the fridge the front display is still on. Maybe it's then running on battery?. I am now gonna try turning off the battery switch. When I turn off the fridge at the display it does power completely off. . The fuses in little black box in rear look good
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07-15-2017, 11:23 AM
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#9
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Georgia Rally Coordinator
Join Date: Jun 2015
Location: GA
Posts: 24,498
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If the frig was left on with gas and the auto button set to gas then you need to go back and turn off frig then restart in auto and let it switch to gas. sounds to me when the gas ran out you did not give the new tank time to get the gas to the frig. Did you purge air out of the line and did you light the stove a couple of times to see if gas is flowing to it. Usually I have to do this when the gas has been depleted from the lines over a period of time. Later RJD
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Traded 2015 30WRLIKS V-Lite
Days camped 2019 62
Days camped 2020 49 days camped 2021-74 2022-40 days 2023 5 days
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07-15-2017, 11:44 AM
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#10
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Member
Join Date: Dec 2011
Posts: 30
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Quote:
Originally Posted by tmfaulksr
are you saying the display is reading when the fridge is unplugged from main source? if so then it appears the controls are powered elsewhere.
what happens when you turn off the fridge at the display with the on/off button? with or without unplugging the fridge at outside plug?
i would also say consider turning off the battery supply switch if you have one.
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Disconnected power to fridge along with shutting off battery and the front display is still on?
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07-15-2017, 12:19 PM
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#11
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Senior Member
Join Date: Dec 2015
Location: Vermilion Parish, LOUISIANA
Posts: 330
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Quote:
Originally Posted by shawndfr
Disconnected power to fridge along with shutting off battery and the front display is still on?
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wow, not sure what to say to that.
i believe the goal is to shut down power to possibly reset fridge.
hopefully someone can shed light on your latest post.
i say wow again.
ill be following... :-)
__________________
the faulks & prince
2012 Nissan Titan CC
Roadmaster Active Suspension, Firestone Airbags
2015 Rockwood 8289WS Diamond Pkg
2015 Puma 253FBS (sold)
2013 BMW R1200GSW
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07-15-2017, 12:19 PM
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#12
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Member
Join Date: Dec 2011
Posts: 30
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Thanks
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07-15-2017, 12:42 PM
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#13
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Member
Join Date: Dec 2011
Posts: 30
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Going to keep the fridge running on propane till I can get a serviceman out. I am using 2 30 lb tanks Can someone tell me how long will propane last .
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07-15-2017, 01:32 PM
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#14
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Senior Member
Join Date: May 2014
Location: Alberta - East of the Rockies, West of the Rest
Posts: 1,785
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First of all a disclaimer: We haven't had a RV fridge for a few years, thus my memory is a bit cloudy.
-If you got the fridge back up and running on propane then leave it, it usually cools better on propane than on 120 Volt AC.
-2 x 30# propane bottles should last for several months if nothing else uses propane in the RV
-There should be a selector switch, on/off switch, try to push and hold it for a few seconds to change from AC to propane and vise versa.
-If you have completely run out of propane you should purge the line by lighting the stove and let it burn for a minute or 2 before re/starting the fridge and the hot water tank for that matter.
-If starting the fridge on propane fails on the 1st attempt wait a couple minutes before you try again.
-Last but not least, here is a link to Dometic user manuals, you have to enter the right model # for your fridge
https://www.dometic.com/en-us/us/sup...manual-archive
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07-15-2017, 01:33 PM
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#15
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Senior Member
Join Date: Apr 2014
Location: Twin Cities, Minnesota
Posts: 320
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Your refrigerator should last a couple of weeks or longer on two propane tanks.
I recommend turning the refrigerator off at the panel, disconnecting the negative battery lead to ensure no DC power to your refrigerator and disconnect the AC power for good measure. After 30 seconds, restore the AC, reconnect to the battery and turn on refrigerator's power back on at the panel. If the problem persists, then perhaps a service call is needed.
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2015 Wildcat 282 RKX
2011 F350 Lariat, 6.7 L. Diesel, 8 ft., SRW, Reese R20
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07-15-2017, 04:27 PM
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#16
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Senior Member
Join Date: Aug 2016
Location: Worthington, MN
Posts: 230
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Quote:
Originally Posted by shawndfr
Going to keep the fridge running on propane till I can get a serviceman out. I am using 2 30 lb tanks Can someone tell me how long will propane last .
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Just checked mine, I can go 14 days with the fridge and hot water heater.
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07-15-2017, 05:54 PM
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#17
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Member
Join Date: Mar 2014
Posts: 47
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Fuse
You said you pulled the fuses out and they look good. I would put a ohm meter on both of them to check continuity and make sure they are really good. The glass one in mine looked good util tested. I replaced it and that resolved the issue. There is a 12v 15 amp fuse in the fuse box control panel check to see if it is blown. You can put a volt meter on the red and black leads in that covered area and check the 12v. Hope that helps.
Dave...
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07-15-2017, 06:26 PM
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#18
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Member
Join Date: Jul 2011
Location: NW Missouri
Posts: 94
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We made it two weeks on two 30 pound tanks running the fridge and water heater.
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07-15-2017, 06:27 PM
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#19
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Member
Join Date: Jul 2011
Location: NW Missouri
Posts: 94
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I'm guessing your electric heating element is bad thus not allowing the fridge to cool.
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07-15-2017, 09:55 PM
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#20
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Junior Member
Join Date: Jan 2017
Posts: 12
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My 2017 sunseeker 3050s had this problem. Drove from dealer 200 miles from with fridge working on lp. Sar in driveway plugged in to electric for 6 weeks. Started packing for trip, no lp.
Bad control board in 4 door fridge. Dealer had to remove fridge from new unit on lot, replace defective board in mine and then get a new board from manufacturer.
Been about 6 months now and all is good.
Dan
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