You will need to open the control panel and tilt it back against the wall.
( screw in the corners of the control panel securing panel to washer top).
With panel up, remove the two large spring clips securing the top to the back panel.
Slide the cabinet and top out(towards you) a few inches and disconnect the lid switch harness, slide the cabinet assembly off the frame and out of the way.
The pump is mounted to the motor with two spring clips, remove clips and slide pump off motor shaft.
Check to see or feel pump shaft for easy movement in both directions,
Disconnect hoses and check for clogs,articles stuck .
Let us know what you find,