Just got off the phone with Whirlpool and it seems that, based on the serial number, mine is not one of the refrigerators that are involved with the issue of having the 'P' trap needing to be replaced. Seems like there it was earlier models that fell into this category. I guess that this is good news but now I will be worried that I still may have this issue. Will have to wait and see. If anyone else calls, please let us know what they say about your refrigerator.
Tom and Margaret
2014 Berkshire 390bh-60