Desert Captain
Tucson
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Joined: 02/19/2011
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A lot of frig's will always, automatically switch to AC if it is available. I think you can turn off the breaker to override this if you want to run on gas while hooked up to AC but it probably varies by manufacturer. Can't site any proof but I too think gas is more efficient. 
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Sloop Smitten
San Marcos, CA
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Joined: 12/14/2011
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I noticed when people are using my frig frequently and the temperature in the box rises it recovers much more slowly when on electricity as opposed to gas. I'd say twice as long. I usually leave mine on gas during the day and switch to electricity at night when all go to bed and the frig is less prone to being opened. It is also a little cooler at night so that helps with the inefficiency of the electric cooling as well. If there was no differnece in the efficency I would use electricity whenever I could.
1992 Fleetwood Jamboree Rallye 24' M/H
Ford E350 Chassis, 7.5L Engine, E40D Transmission
My other motorhome is a 1978 Catalina 25 Sailboat
Cruising Califonia, Sailing the Pacific!
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Gale Hawkins
Murray, KY
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Joined: 07/22/2007
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Electric vs propane effectiveness can vary from frig to firg. Our 1992 Norcold with the reman Amish unit will cool faster for the first hour on propane and after that it performs better on electric was proven by several batteries of tests.
Perfer electric heat vs open flame if I have a choice.
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Mootpoint
Somewhere in North America enjoying the life!
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Joined: 07/31/2006
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robsouth wrote:BB_TX wrote:I just leave mine on auto. Runs on electric when hooked up, gas when not.
X2
X3
Nothing sucks more than that moment during an argument when you realize you're wrong.
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gbopp
The Keystone State
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Joined: 08/03/2008
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dqdick wrote:ch-ta wrote:Fire Instructor wrote:I switch to elec when I have a hook-up. I figure that I'm paying extra for the elec, so i mightjust as well use it, and save my propane for later.
X2, same here.
X3.
X4
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Dave H M
IL
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Joined: 08/11/2006
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I leave mine on auto and don't worry about it. It seems to cool fine when plugged in.
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Kennedycamper
Algoa, Texas
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Joined: 05/24/2006
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I only run propane mode while on the road. Might as well use electricity if available. It's safer, and I already paid for it.
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MrWizard
Traveling
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Joined: 06/27/2004
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when I had an rv absorption fridge it was on propane 24-7 no matter where or when
the only time I used electric was when I slipped up an ran out of propane
I used the 120v option as emg backup
Options, always have options, and the journey goes much smoother
....
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wa8yxm
Wherever I happen to park
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Joined: 07/04/2006
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Son of Norway wrote:I remember learning somewhere that RV refrigerators run more efficiently on gas, but I have no proof.
Miles
I do not think it runs any better on Gas, but I have locked mine on gass and forgotten to set it back to auto for an extended period of time
I lock it on gas because I feed the ice maker 120vac from the inverter, I do not wish to power the fridge off the inverter.
That said... When I'm in arizona.. I am usually boondocking, and thus on gas.
Nothin adds excitment like something that is none of your business
Kenwood TS-2000 housed in a 2005 Damon Intruder 377
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Bit Bucket
Brookings, Oregon
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Joined: 04/29/2011
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wa8yxm wrote:I lock it on gas because I feed the ice maker 120vac from the inverter, I do not wish to power the fridge off the inverter.
What are you using for an ice maker if you don't mind my asking?
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