Suds error on whirlpool steam washer

My washer is showing a “Suds Error” and when I keep tyring to start it, the results is a “F35 Error”. Trouble shooting guide points to bad pump.
Any further Ideas before I order this part?

Replace pressure switch and use very little HE approved soap in the future. No more than an ounce.

Ardvaark

[quote=Ardvaark;479343]Replace pressure switch and use very little HE approved soap in the future. No more than an ounce.

Ardvaark[/quote]
Where can I find the part number?