12v 3-way fridge Q

Submitted: Wednesday, Mar 10, 2010 at 21:17
ThreadID: 76756 Views:2509 Replies:1 FollowUps:1
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Have finished wiring 3-way fridge in van to engine bay using 6B&S with electronic controller (ARB) in engine bay and anderson plugs connecting tug and van (plus fuses)
I am getting 12.4v at the rear of the fridge. Have tested and, yes, the fridge stayed cool over many hours. In fact - it got cooler...
Was -17.9C when switched from 240v a/c to 12v - and over 2 hours went cooler to -21.4C...
Wow..!!
I know that on 12v operation there is no thermostat control
So the question is: While driving - does the freezer/fridge just keep getting colder and colder over time...?
And therefore: Does the 12v heating element/housing/adjacent area keep getting hotter and hotter - Is there a risk there..?
Should I consider installing a thermostat inside the freezer/fridge to control the on/off of 12v...?
Thanks
Jedo
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Reply By: Notso - Wednesday, Mar 10, 2010 at 21:29

Wednesday, Mar 10, 2010 at 21:29
Eventually it will reach equilibrium. Depending on the ambient temp the temp will vary a fair bit.

They use about 12 amps on 12 volt but no the element won't keep getting hotter and hotter, like everything else it will reach a temp where there is as much heat loss as heat input.

AnswerID: 408300

Follow Up By: Notso - Wednesday, Mar 10, 2010 at 21:29

Wednesday, Mar 10, 2010 at 21:29
Just make sure it's well ventilated around the fridge.
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FollowupID: 678230

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