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.
A true lover of nature does not despair now that his mistress has turned a colder cheek.