the problem with the op's soup wasn't the crock pot, but the amount of liquid required for the dryness of the peas.
they must have been very old.
i am unable to post it now, but search my username a crock pot split pea soup with ham and you'll gey a tnt (dozens of times tried) recipe for the soup.
if you have no leftover ham and bone, use rendered bacon and a ham steak. or you can leave it out completely, but it's missing somethimg that way, imo, but vegetarian friends say it's good.
in nomine patri, et fili, et spiritus sancti.
Meh nom eh noh...doot dooooo do do do.