Good Sam Club Open Roads Forum: 2-way refrigerator operation without a battery
Open Roads Forum Already a member? Login here.   If not, Register Today!  |  Help

Newest  |  Active  |  Popular  |  RVing FAQ Forum Rules  |  Forum Posting Help and Support  |  Contact  

Search:   Advanced Search

Search only in Tech Issues

Open Roads Forum  >  Tech Issues

 > 2-way refrigerator operation without a battery

Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Page of 4  
Next
DieselBurps

SLC

Senior Member

Joined: 11/24/2013

View Profile


Offline
Posted: 09/25/20 10:23am Link  |  Quote  |  Print  |  Notify Moderator

I have a basic question I can not find the answer to.

I have a Dometic 2 way fridge (propane/120volt) in a 1985 Airstream. I can not get the fridge to run on either 120 volts or gas.

I do not have a battery at this time.(I am on shore power)

Do I need a battery to run the fridge even though I am hooked up to shore power?

Is the battery required in order to "complete the circuit"?

I assumed since I am on shore power the fridge should work either way even though I do not have a battery.

Vw triker

Millboro, va

New Member

Joined: 07/22/2017

View Profile


Offline
Posted: 09/25/20 10:26am Link  |  Quote  |  Print  |  Notify Moderator

Pretty sure you need a battery for the electronic parts, would think you need battery to light up the propane, I am sure you will get a proper response shortly.

Roger10378

Goodrich, MI.

Senior Member

Joined: 05/29/2008

View Profile



Good Sam RV Club Member

Offline
Posted: 09/25/20 10:43am Link  |  Quote  |  Print  |  Notify Moderator

You do need 12v for the control board in order for the refrigerator to work. If you have a working converter or battery you should be good.


2005 Cardinal 30TS
2007 Chevy 2500HD D/A

BFL13

Victoria, BC

Senior Member

Joined: 02/15/2006

View Profile



Posted: 09/25/20 10:45am Link  |  Quote  |  Print  |  Notify Moderator

You need 12v to run the fridge in either AC or gas modes. You can get that 12v with no battery from your converter (makes 12v from 120v) but in the 1985 Rv, not sure how that works.

You could get a battery, but also you need a way to recharge it, so a simple deck mount converter in addition would be a help if the 1985 converter has no charger to it.

In theory you could get a battery and just use any battery charger to recharge it as required, but that could be tiresome, so a converter that stays on would be preferable IMO.


1. 1991 Oakland 28DB Class C
on Ford E350-460-7.5 Gas EFI
Photo in Profile
2. 1991 Bighorn 9.5ft Truck Camper on 2003 Chev 2500HD 6.0 Gas
See Profile for Electronic set-ups for 1. and 2.

Lwiddis

Lone Pine, CA

Senior Member

Joined: 08/12/2016

View Profile



Good Sam RV Club Member

Offline
Posted: 09/25/20 10:55am Link  |  Quote  |  Print  |  Notify Moderator

Solar is the easy way to keep a battery charged.


Winnebago 2101DS TT & 2020 Chevy Silverado 1500 LTZ Z71, 300 watts solar-parallel & MPPT, Trojan T-125s. TALL pole for flags. Prefer USFS, COE, BLM, NPS, TVA, USF&WS, state & county camps. Bicyclist! 14 year Army vet - 11B40 then 11A - (MOS 1542 & 1560)


BurbMan

Islip, Long Island

Senior Member

Joined: 09/20/2001

View Profile



Good Sam RV Club Member


Posted: 09/25/20 10:57am Link  |  Quote  |  Print  |  Notify Moderator

Yes, you need 12v to power the control board in the fridge regardless if running on 120v or gas. As long as the converter/charger in the trailer is putting out 12v you shouldn't need a battery.

However, some older converter/chargers won't put out 12v without a battery in the circuit. If this is true for yours, you won't have any 12v power at all. If you other 12v items working like the water pump, interior lights, and radio, then you have 12v in the trailer, and the fridge issue is likely either a fuse of bad control board.

There are tons of YouTube videos on diagnosing an absorption fridge...you want to diagnose well because it gets expensive in a hurry if you just start throwing parts at them.


2015 Ram 3500 SRW 4x4 Laramie Crew Cab Long Box, Cummins diesel
2002 Lance 811 Slide-In Camper
SOLD: 2008 Terry 34' TT
SOLD: 2001 K2500LT 8.1L Suburban

Lance 811 Renovation Story!
Project Complete!
Maiden Voyage!


RLS7201

Beautyful Downtown Gladstone, MO

Senior Member

Joined: 10/26/2002

View Profile


Offline
Posted: 09/25/20 11:00am Link  |  Quote  |  Print  |  Notify Moderator

1985 is probably stand alone propane, just like a home water heater. No 12 volt required.

Richard


95 Bounder 32H F53
460/528 stroker
Web Master
MWPSchooners.com
First brake job
1941 Hudson


2oldman

Mecca

Senior Member

Joined: 04/15/2001

View Profile


Offline
Posted: 09/25/20 11:07am Link  |  Quote  |  Print  |  Notify Moderator

Do the lights work?

Old-Biscuit

Verde Valley

Senior Member

Joined: 06/20/2009

View Profile



Posted: 09/25/20 11:09am Link  |  Quote  |  Print  |  Notify Moderator

As mentioned......
1985 vintage converter will need a battery to act as load so 12VDC system can be supplied.

Yes...your AC/Gas Fridge will need DC Voltage to function...circuit board, display, controls for electric and gas

That is provided your converter is functioning
AC IN==DC OUT (converter should have 13.2VDC Output minimum

Check DC Voltage on DC Dist Board (where all the fuses are)


Is it time for your medication or mine?


2007 DODGE 3500 QC SRW 5.9L CTD In-Bed 'quiet gen'
2007 HitchHiker II 32.5 UKTG 2000W Xantex Inverter
On the Road Debt Free April '07
Off the road still Debt Free Jan. '14

bob_nestor

murphy

Senior Member

Joined: 05/08/2005

View Profile


Offline
Posted: 09/25/20 11:15am Link  |  Quote  |  Print  |  Notify Moderator

RLS7201 wrote:

1985 is probably stand alone propane, just like a home water heater. No 12 volt required.

Richard


Pretty sure piezoelectric igniters weren't widely used back in 1985 and without them you'd need another ignition source - either electric or a manually lit pilot light. But even with a piezoelectric you'd still have to manually get it started just like a pilot light.

Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Page of 4  
Next

Open Roads Forum  >  Tech Issues

 > 2-way refrigerator operation without a battery
Search:   Advanced Search

Search only in Tech Issues


New posts No new posts
Closed, new posts Closed, no new posts
Moved, new posts Moved, no new posts

Adjust text size:




© 2020 CWI, Inc. © 2020 Good Sam Enterprises, LLC. All Rights Reserved.