Double check the fuse again. But, concentrate on the fuse holder itself. Look for dirt, looseness and, especially corrosion.
It was over a year ago that I posted (above) my frustrations with the Norcold fuse. During the first years of ownership I consumed a couple boxes of fuses.
When I wrote that post, the current fuse was three years old and I thought the problem was solved. I thought that crimping the fuse holder to hold the fuse tighter was a permanent fix. About a month later, the fridge quit. Out of habit and experience, I went straight to that fuse. The circuit board had destroyed itself. There was a black, charred circle around the that fuse.
My Norcold had experienced and electrical fire. I am very happy that it contained itself to the circuit board. It could have spread. I don't know how close I came to a real motorhome fire. There are a few recalls on the fridge I have. One is to install a thermistor placed on the exhaust vent that will shut down the fridge if the stack gets hot.
At the time I made a brief attempt to talk to Norcold. I couldn't connect to anyone that was interested. I focused on fixing the fridge before the beer got warm and the milk spoiled.
I needed a new circuit board. Getting one from Norcold got frustrating and the price was high. Then I remembered fixing a fridge in an old Terry trailer we had. The solution was an aftermarket circuit board favored by some (or many) service techs. A little googling and I was able to remember the brand "Dinosaur".
http://www.dinosaurelectronics.com/Nor_boards.htm Dinosaur quickly located a nearby dealer/repair service that quickly Fedexed the board to me at half the cost of a Norcold.
The new board looked like the burnt one -- except everything was more "robust". The troublesome fuse holder was especially more rugged and even had it's own little cover. The board was easy to install in about a half hour.
I am convinced the Norcold fuse holder is a defective design issue. It is too weak, too small, too loose and might have a "dissimilar metal" corrosion issue. The corrosion or looseness caused mine to get hot enough that the solder inside the fuse would melt. The fuses did not blow from an electrical fault. The wires in the multiple fuses that I replaced were visibly intact and undamaged.
I thought I fixed the Norcold fuse holder by crimping it to hold the fuse more securely. It still got hot enough that the board burned around the holder. I am worried that this flaw may have lead to motorhome fires. I had one, but it was small. There is no reason it couldn't have grown bigger.
