Paul I. wrote:
Bill brings up a lot of good pionts! I have a "07" V258 and what I noticed, that the wiring was about 14 guage. Which I feel is too light and causing a voltage drop. Which could go back to what Bill was saying "running a bit less effectively on 12v than it used to." & "It's possible the unit is overheating". I would take a voltage reading from or as close to the back of the fridge as I could. This needs to be done as the compresser is running and than with it powered off. At off, you should read, about 12.5 volts & on should be about 11.5V. For me, anything less, I would think about replacing it with #10 wire.
An excellent point. I have not tested mine. I can't recall for certain but it might be possible to test it without pulling the fridge out entirely. The AC line was connected on the left side of the fridge, and I think the DC wire was close to it also. It might therefor be possible to pull out the drawers and reach back to grab the wires.
But if not it's pretty easy to pull the fridge. Just unscrew the top door hinge pin, remove the door and then all the screws around the face frame (cordless screwdrivers are you friend here). Put the door back on when you pull the box so the contents don't dump out. Take care, the bottom of the fridge does not go all the way back, it's got a stepped design. You want to be careful not to allow the next step up to hit anything when you pull it out. The cooling coils do not take kindly to being banged into things. As you pull it out only go about 4 inches and then be prepared to pick it up while continuing to pull it out. Might sound complicated but it'll make sense once you see it.