TGoods, thanks for the post. My son got it all figured out. He went back to the two other ones, and tested them, and they also did the same, then he got into his manuals on his tablet and the manual said what your post said, so he changed the molex plug that was all taped up, and it did full to the full setting, then advised the Apt-ment manager, and he said to put it back to the lower setting till he gets advice from the owners.
So thanks for the infor. I had went to a new hotel here in my small town, and they had 3 of these new Whirlpool washers with the low rinse setting, and I had not run into this before, so the maintainance man couldn't garrantee me my money if I fix'd it, so nothing more was done, so didn't get to figure out why I was getting the lower rinse setting, so left with things as I found them.
I did remove the controls and seen the two water level switches, but thats as far as I got.
Thanks for the post TGoods.