Recently we had our coach in for some service and I was telling the tech. that we had
never been happy with the way the fridge worked and was considering putting in a residential fridge. Our complaint on the fridge was that it would get cold enough, but once the door was opened, it would take a day or more for it to cool down again. Very long recovery time. And yes my DW does tend to over load the fridge.
The tech said he had a fix and I told him to go for it. The tech went up on the roof and took off the vent cover over the fridge. We all ready had fans behind the fridge blowing up towards the roof over the fridge coils. The fridge has an empty space above it on up to the bottom side of the roof. The tech filled this empty space with insulation. He then put a barrier from the back top of the fridge up to the roof vent to hold the insulation in place. Basically what he did was create a tunnel effect for the air to flow over the fridge coils.
This has been one of the best mods ever!!!! Prior to this the fridge would get up to 50 degrees and take a long time (day or more) to cool back down to the mid to high 30's. Now, we have not seen the inside temp go over 40 and with in a couple of hours the temp is back down to the mid 20's. The freezer is staying at zero or below. The ice maker is making ice a lot quicker.
We happen to have a Dometic model DM2852 and it hasn't worked this good since it was brand new. The tech said his fix will work on any Norcold or Dometic that has the empty space above it. He also said the addition of fans (which we have) behind the fridge is a great addition because it will give the fridge the ventilation it needs to operate.
you got yours. 
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