How a refrigerator works on a 1989 Grady Marlin

[fishfinder6]

Hello.
Does anyone know the operation of the refrigerator on a 1989 Grady Marlin?
I flip the switch on the 12 volt panel today and heard what sounded like it turned on, I don't know how to operate it! Help!
Thanks

 

[Legend]

Do you have the brand? Mine is a 2004 Isotherm. The refrigerator has a round knob inside the frig up in the back right hand corner . It has on off switch that rotates to set the desired temperature for the unit, To turn off turn all the way to the left unit the knob click into the off position,

 

[seasick]

Also note; that type of fridge doesn't make a lot (basically no) noise when it's running. Most also have a circuit that will turn it off if the supply voltage drops below a set value . That protects it from completely running down the battery.

 

[Ozz043]

FISHFINDER..., I just turn mine on at the 12v switch and leave it on...the shore power battery charger keeps the batteries fully charged...only turn it off if there’s a big storm coming in case of a power outage

SEASICK....how/where is the voltage relay/switch thingy? ... ( VSR ? ). I always thought there would be something wired in..

 

[seasick]

On my Isotherm is is part of the fridges control board, built in.