Product review (5 stars): There are plenty of testimonials and online videos (this is a good one: https
After finding water on the floor a couple of times intermittently, doing research online I discovered I was suffering the same problem so many others were with a clogged defrost drain.  I saw all the varying posts about Whirlpool covering the repair or just the part or nothing at all.  I opened a chat session with someone at Whirlpool through the website.  The woman would not budge from insisting this isn't a manufacturer defect, the new part was not created as an acknowledgment of the defect, and I'd have to pay for an authorized repairman to come out.  If the repairman deemed the clogged valve was the cause of the problem the new part would be free but I'd still have to pay for the repair.  There are plenty of testimonials and online videos (this is a good one:  https://www.youtube.com/watch?v=Tk24ISRzSRs) so there is no way I'm paying to have this done.  I then called the customer service number on the website (1-866-698-2538) and got someone else on the line.  I explained the issue, gave her the new part number, and after a few minutes on hold so she could check into the situation she came back on to tell me they could send the part to me free of charge.  I haven't gotten the part yet and hopefully I'll be able to fix the problem without incident but I wanted to share this with everyone.  If you don't initially get satisfaction from Whirlpool (or the manufacturer of your appliance suffering this problem) try a different number/approach.  Some workers are just robot gate keepers who don't care.  Some are better.