First we need to drain the water in the tub. It’s full and the machine is heavy because … the error code means ‘not draining’. You'll be draining about 2-3 gallons of water. But first, reach from behind and pull the drain pump (in front) off its rubber mounts so it’s free from the bottom support.

Next, Get 3-4 2x4s, stack them up, and tilt the machine backwards so the front is elevated ~5” and the back is on the floor. Put a baking dish or a couple nested aluminum turkey pans underneath and Manipulate the pump so the threaded strainer is accessible. Open it 1/2 turn until liquid dribbles out.

You can lift the pump and slide the aluminum turkey pan out for each liquid dump cycle. Be forewarned that the drain water will stink. Don’t get enthusiastic and unscrew it more than enough to dribble out or it overflow onto your floor, which is easy to do. When the last of the water is out, fully unscrew the drain pump strainer and remove it.

An amazing amount of garf and debris will come out with it. Clear the garf from the strainer and screw the strainer back together. Now comes the shortcut. At this point, you’ll not be able to put the drain pump back in because the rubber mounts to the base are inaccessible from either the rear or the front.

An internet search on this model will suggest a complete teardown to access/install the drain strainer, skip that and go to next step.