why did fridge do this?

[dwayne]

no biggy just want to know
I forgot to switch off the gas when i arrived at the site and hooked up and switched to lecky
So switch on lecky position gas still burning = warm fridge in the morning

[andisnewsyncro]

Don't know mate, but a bit worried if you're driving about with your gas on...

12 V for travelling, 240v if on hook up, gas ONLY when parked up without electric hook up

[Mocki]

because you over heated the liquid

[jason k]

yup whs /\/\/\/\/\/\. you shouldnt run on both.

[Cruz]

Why did the fridge do it? It didn't, the forgetful user did

[kevtherev]

Inside your fridge is a mixture of Ammonia, Hydrogen gas and Water
Normally, ammonia is a gas at room temperature (with a boiling point of -33 °C), but the system is pressurized to the point that the ammonia is a liquid at room temperature.
The cooling cycle starts at the evaporator, where liquefied ammonia enters.
The "evaporator" contains hydrogen gas, which lowers the pressure.
Now using Dalton's law, a substance's boiling point changes with pressure. (simplified)
The lowered partial pressure of ammonia changes the ammonia's boiling point, bringing it low enough that it can now boil below room temperature.

When it boils, it takes some heat away with it from the evaporator - which produces the "cold" desired in the refrigerator.

At this point, the ammonia-water solution is not usable for refrigeration, as the mixture won't boil at a low enough temperature to be a worthwhile refrigerant. It's now necessary to separate the ammonia from the water. This is where the heat from the flame comes in. when the Ammonia-Hydrogen-Water solution enters the boiler, with the correct amount of heat, the ammonia bubbles out separating itself from the solution, too much heat and it is contaminated with water which retains heat
that heat is transfered into the fridge.

or as Mocki said you heated the liquid too much

[dwayne]

thanks for the replies and the concise explanation kev now i know
Sometimes i forget to switch to 12v and i drive 2 miles did drive back from rtth on gas though suprised it never went out doing 90

Hey ho some of up have short term memory loss

[Headley18]

Never ever drive with the fridge lit on gas, if you call in to fill up on fuel you have a naked flame very close to the fuel filler

[toolsntat]

Inside your fridge is............., too much heat and it is contaminated with water which retains heat
that heat is transfered into the fridge.

edited to save space

The dark art of mobile refrigeration has taken another battering with that concise but very understandable explanation
Thanks Kev

Another bit of info that I had misunderstood for some time now was the bit about fridges needing to be level
My understanding was that to get the gas to light it needed to be level...
Well I had disproved this when after cleaning my burner jet ,(parked up the kerb at a right jaunty angle), I got it to light and had it on well long enough to frost the ice shelf
In truth the real reason is given in the last section of this very handy study of fridge workings
http://www.rvmobile.com/Tech/Trouble/cooldoc.htm" onclick="window.open(this.href);return false;
Hope it helps....
Andy