How to Troubleshoot & Replace Whirlpool AP4567129 / W10337781 Water Level Switch Pressure Switch

Fluke Multi-meter, 1/4" nut driver, needle nose pliers, 5 in 1 Painter's tool. Unplug it. Removed water setting knob from front control area, loosened (2) 1/4" hex screws at back of control panel, released spring lock on control panel, released spring lock to back of washer, removed washer shroud, removed pressure switch, (CCW 1/4 turn), remove existing Pressure tube. Installed new Pressure Switch and Pressure Tube. Reinstall everything in reverse. Plug it in, test all 4 water levels. (within 1/16 of an inch at each stop) "Piece a cake" 

ReplaceD water level switch . Video helped but hose clamp shown in video was not included. I used a spare one that was on hand. 

I ordered the part from "The Pros" and received it the next day by FedEx. It went in smoothly and was the correct part. All is well and I'm back in the laundry business! Thanks APP! Your gals were helpful, knowledgeable and friendly. You make this imperfect world of machines much more tolerable! 

Replaced water sensor switch ("fill volume") and associated tubing. AppliancePartsPros video (Youtube) was very helpful. Ordered part - it arrived two days sooner than I expected it (using regular shipping). Order was filled the same day it was ordered and, surprisingly, arrived the next day. 

Replaced water level control switch after watching an instructional video.