Is 1901A the replacement pump for my kitchenaide ice maker #kuic15nlts0 ?
Yes the 1901A would be the correct replacement drain pump for your kitchenaid ice machine.
Does this pump have a check valve for a gravity feed. And which side is the check valve on. Whats the max height on the pump. Water keeps backing up out of vent hose. Let me see a diagram if i can. Thank you stephen.
If the water is backing up into the ice bin part of the unit then the most likely issue will be the drain pump. Unfortunately we do not have a wiring diagram of the drain pump. There is not a check valve on the gravity feed.