Circa January 2022: Our Whirlpool Model WRS555SIHZ03 refrigerator was new in August 2020, purchased at Lowe’s, with 5-year extended warranty. I’d say within a year ago, the icemaker stopped making ice the first time. I noticed that someone in the house fat-fingered the front Control Panel, causing the freezer compartment temperature to be DECREASED to the COLDEST setting!? What I did to fix this problem: 1) Set the freezer temp on the Control Panel to the WARMEST setting (one bar). 2) Cleared the frost from the Shut Off Arm. 3) Cycled the On/Off Switch, and the Storage Bin Sensor Switch. This apparently was enough, after 15-30 minutes, to thaw an apparent blockage in the Supply Line, according to other reports here. I heard the water supply begin to flow again to the ice maker. Soon the first batch of ice was dumped into the empty Storage Bin. By late, late evening, the Storage Bin had an ample supply. By the morning, the Bin was full and the Shut Off Arm was again regulating the cycling of the icemaker. I then reset the freezer temp to the “checked value” (3 bars). Victory!
March 27th, 2002: This week of March 23rd, 2022, the ice Storage Bin was empty once again! Once again, the freezer compartment temp had somehow been decreased to a value lower then the “checked value” on the Control Panel. There is no build-up of frost or icing around the Shut Off Arm this time. I am currently in the midst of shooting this recurring trouble, and will attempt: 1) Resetting the ice maker using the On/Off Switch (Off for at least 10 minutes), and 2) CAREFULLY thawing the area with a hair dryer. I don’t see a Black Supply Line anywhere, but I’ll still try it. Wish me luck!
June 18th, 2022: It's taken me several weeks to catch up to write this, but Circa April 2022, for a couple of weeks after setting the freezer to the proper temp as above, I tried resetting the icemaker power as suggested by the article on The Ice Making Hub (How To Reset Whirlpool Ice Maker), but without success. I could NOT hear the flow of water into the icemaker, and did not restore the flow of ice cubes into the Storage Bin.
I then determined to use my wife's hair dryer ON LOW HEAT SETTING to gently warm things up around the icemaker and behind the fascia covering it. With the Storage Bin removed and Power Button (rocker switch) turned off, I directed warm air upwards over the icemaker assembly itself, until no more frost or water droplets remained. I also directed warm air through the louver in the fascia into which chilled air flows over the icemaker assembly to make ice. I guess I did this for 10-15 minutes. Afterwards, I again cycled the power button. Then, I waited.
LO, AND BEHOLD, within 20 or 30 minutes, the flow of ice cubes into the Storage Bin began again. Slowly at first, but then a regular avalanche of cubes, filling the Bin within a few hours. This icemaker, when on its game, sounds like river stones being thrown against a metal barn! I started the resetting process with the freezer temp on 1 bar, and have raised it to 2 bars for several weeks. I'm shy of raising it to the checked value of 3 bars, but may do so since, at this time of year, the temperature in the house is warm enough to perhaps warrant doing so. Leaving it at 2 bars may not slow down the rate of making ice, even with a warm house, but we'll see. We use a lot of ice at our house. Again, Victory!