F21 error

Most likely the pump, yours has a cleanout on the front of the pump, however there is no drain. You have to bail as much as you can, I tilt them up at a 45 to put the pump higher than the water level and then you can swap the pump with that last amount of water not spilling everywhere. To access the pump 3 screws across front bottom panel. And remove the lower 1/3 of the machine. Your looking right at the pump in the center.This is a pretty simple one. Just 2 hoses, and 1 wiring connection. Once you see the new one, it’s hard to explain how it mounts but very self explanatory looking at the new part. Lemme know if you need anything else on this one. No charge for further assistance, and happy to walk you through swapping it, but yes an F21 is a drain error, if there are no clogs it’s a bad pump. Thanks!