No water is coming into the tub when I select wash on hot (and only cold when I select wash on warm). Cold for cold wash, obviously. Hoses are hooked up and turned on and getting pressure to the washer. Cleaned out the screen filters but did not fix the problem. Is there a hot/cold valve that tends to stick? How to get to it? Thanks.

Thanks for the post. Problem was the hot water valve. Scalped the valve assembly off another washer that recently broke and both hot and cold are working like a champ. Problem solved.