Product review (5 stars): check the washer drain line right before the filter and the drain filter first!
I picked this up hoping to fix the infamous F35/SUDS error.  Before buying this part I opened and cleaned out the drain filter and disconnected the drain line right where it connects to the drain filter.  There was one of my kids socks in there.  Definitely give that a try first.  After still receiving the error I went back to this video [...] and decided to replace the pressure switch.  Other FAQs on this issue say something about water getting in that line and messing up the chip.  Mine was dry and showed no signs of ever being wet.  So I was a bit worried it was one of the other parts that had the issue.  Luckily the new pressure switch fixed the error, and removing that sock also made a big difference in how well the laundry was getting cleaned.  It's disappointing that this one overly expensive part seems to fail on so many units.  Other than that issue my washer has been great (Maytag 5000 series).  Also props to Amazon for allowing me to upgrade my Prime 2-day shipping to next day for only $4 more.  My kid was sick and vomited on a lot of stuff and of course the washer decided to go out at the same time.