Let's start by saying that I have tried almost everything to get rid off a bad mildew odor in the ice cubes from my Viking DFSB423 refrigerator. I have cleaned up the inside of the refrigerator a couple of times, used sodium bicarbonate, vinegar and even put the ice tray in the dishwasher on sanitize mode with no luck. Weird thing is that you can rinse the ice cubes before putting them in a glass and most of the odor is gone. I have put other ice trays in the freezer to see if the odor comes from the air flowing inside the freezer but the ice cubes created with these trays are totally fine with no odors. I also went and bought a new ice maker to replace the old one thinking was something in the plastic, but the odor is still there. It is worth noting that this fridge doesn't have a water filter, so the problem seems to me is related to the water some how. However, this fridge has never had a water filter and ice cubes were fine with no odor for several years prior to this problem. My research has led me to replace the water inlet valve underneath the fridge which in other internet forums people said there may be some kind of mold accumulation inside the water valve, so this is my next project before I put a filter in the water line (I find this more difficult as I have little to no space to work on the water source copper line that is underneath the kitchen sink).
The water source comes from a copper line that ends behind the built-in fridge. From that point there is a flexible 1/4 braided water tubing connecting to the water inlet valve underneath the refrigerator. From that point, there is plastic tubing going from underneath to behind the freezer I believe. I am planning on replacing everything from the braided flexible tubing, water inlet valve, to the plastic tubing. I have part order number PA970012 for the water inlet valve but haven't been able to find the plastic tubing part number in the internet. Is this something you can have access to? Or is it just a universal 1/4 plastic line I can get in the home improvement stores?
Also, do you have access to a parts diagram for this refrigerator showing where the different parts are located? I wanted to get an idea on how to access the plastic tubing portion that ends inside the freezer before pulling the freezer out from its location.
I have other issues with this refrigerator like the defrosting tray filling up with water every month and ice frost build up in the fan that circulate air from the freezer to the fridge section on the very top. The tray has a heated system down below with a 24V fan next to it which by the way is unplugged. There is a bunch of wires in between so not sure where to start. Anyways, I am planning on opening up new topics for each problem though. So let's stick with the water inlet valve replacement process here.
BTW, I have this fridge service manual which I found here in Appliantology about a year ago, but it hasn't been very helpful.
Any help is much appreciated.