Dishwasher Not Filling Correctly

[MTDIYer]

I have a Kenmore UltraWash QuietGuardDeluxe dishwasher 655.13112k701 that is old and has worked well. Recently, it has not been filling properly. Now before you say it is probably the float, what it does is fill correctly for the first wash. But the second and subsequent washes, it does not fill with enough water and I have to manually add hot water so it does wash correctly.

Does anyone have any ideas on what could cause this erratic behavior?

 

[user 4883]

1. Check the float even though you think it's not the float.

2. Check the screen in the water solenoid, probably clogged with calcium. By the time it calls for refill, the screen is too clogged to fill properly.

3. Could be a timer problem where the washer goes into next phase of cycle before completely filled. Not sure how to check that, you'll have to guess based on previous performance. Not like I pay attention to mine and how long i takes but, it's possible.