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01-29-2024, 05:36 PM
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#1
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Senior Member
Join Date: Sep 2020
Posts: 102
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Dometic basement freezer
Hi all
My basement freezer is acting up.
If it is plugged into 110 and 12v the display lights up but it will not cool.
As soon as I unplug the 110v, the unit starts to cool with excellent performance.
Should I just leave it run on 12v and forget about it or is there a simple fix?
Thanks for the input.
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01-29-2024, 06:26 PM
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#2
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Senior Member
Winnebago Owners Club Fleetwood Owners Club Holiday Rambler Owners Club
Join Date: Dec 2011
Location: North East Florida
Posts: 2,163
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Have you confirmed that your 120 to 12 volt converter is actually putting out 12 volts? If the voltage is low that may be the problem.
__________________
2019 Horizon 42Q
Cummins L-9 450 HP
Maxum Chassis / IFS with Tag
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01-29-2024, 06:27 PM
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#3
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Senior Member
Join Date: Nov 2005
Posts: 7,837
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Why not just leave it on 120v?
__________________
Old Scout
2015 IH45 Foretravel
2003 Alpine 40' MDTS [Sold]
New Braunfels, Texas
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01-29-2024, 07:08 PM
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#4
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Senior Member
Join Date: Sep 2018
Posts: 1,205
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Quote:
Originally Posted by Old Scout
Why not just leave it on 120v?
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Cuz then it would only be a storage bin with a light?
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01-29-2024, 07:18 PM
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#5
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Senior Member
Join Date: Sep 2018
Posts: 1,205
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Some models have a fuse integrated with the AC plug input, check your manual.
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01-30-2024, 07:38 AM
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#6
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Senior Member
Join Date: May 2021
Location: S.E. Tennessee
Posts: 222
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Have you checked the 120v breaker to see if it is popped? Mine does that sometimes, and a reset brings back the 120v cooling.
__________________
Mark & Kristi
2022 Newmar King Aire
2021 Jeep Wrangler Rubicon
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01-30-2024, 08:30 AM
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#7
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Senior Member
Newmar Owners Club Spartan Chassis
Join Date: Oct 2014
Location: Lake McClure, CA
Posts: 1,454
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Have you checked the voltage with a meter (120v recpt)? If you don't have a meter, plug something else in and see if it works. You didn't say what happens when connected to 120v only.
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2018 Dutch Star 4369 Spartan Chassis
2016 Jeep Cherokee, 1952 Willys CJ3A
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01-30-2024, 11:40 AM
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#8
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Senior Member
Join Date: Sep 2020
Posts: 102
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thanks for all the tips!
Double checked the 110V plug for power. Used a toaster. It has power.
When I unplug the 12V supply and only have on 110V it will not even power up the screen.
I checked the fuse on the Dometic right by where the 110V plugs in and it appears to be functional. I will go get another one just to be sure(i was going to tinfoil it but dont want to cook the entire thing).
__________________
2015 Newmar Dutch Star 4311
2019 Ford Flex
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01-30-2024, 11:48 AM
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#9
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Senior Member
Join Date: Jul 2017
Location: South Dakota
Posts: 637
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I have the CFX3 and when I installed it i called Dometic and they said not to have both 120v and 12v hooked up at the same time.
it will burn out the board. Not sure what model you have but mine I wired it directly to a 12volt supply. 
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Jerry & Sue
2005 Fleetwood Excursion 39J, C7 350, 2015 Chevy Colorado 4x4 Crew Cab. Simi-Retired, 4 Down & Cruising, Sonoma County, CA.Where I park it.
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01-30-2024, 01:47 PM
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#10
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Senior Member
Join Date: Sep 2020
Posts: 102
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tested the fuse. Its good
__________________
2015 Newmar Dutch Star 4311
2019 Ford Flex
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01-30-2024, 03:57 PM
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#11
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Senior Member
Join Date: Jul 2015
Location: Full timers
Posts: 392
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Quote:
Originally Posted by Redram99
tested the fuse. Its good
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Sometimes the 110v cord on the dometic can work its way out a little bit from the drawer being pulled in and out. Might want to check to see if its seated all the way into the fridge.
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01-30-2024, 05:21 PM
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#12
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Senior Member
Newmar Owners Club Tiffin Owners Club
Join Date: Mar 2018
Location: Portland, OR
Posts: 829
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Quote:
Originally Posted by Jpiland
I have the CFX3 and when I installed it i called Dometic and they said not to have both 120v and 12v hooked up at the same time.
it will burn out the board. Not sure what model you have but mine I wired it directly to a 12volt supply. |
And as I read this I know this is how mine came from the factory, plugged into both... oops...
Best,
-Mark
__________________
2023 Newmar New Aire 3543
2018 Tiffin Wayfarer 24BW
2013 Fiat 500 Turbo Dinghy
2024- Present Secretary & Treasurer, NKK Oregon Explorers
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01-30-2024, 08:48 PM
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#13
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Senior Member
Join Date: Sep 2020
Posts: 102
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Odd why mine quits working as soon as I plug the 110v into it. Lights come on but it will not cool.
As soon as I unplug the 110 plug, it starts to cool.
On 110 only it won’t even light up.
Maybe the internal inverter is fried?
Weird.
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01-31-2024, 05:46 AM
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#14
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Senior Member
Join Date: Jul 2015
Location: Full timers
Posts: 392
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Is it a model that you can connect your phone to it? if so see if you can access the functions through that while connected to 110 to see if there is something off through that.
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