Kenmore won't fill, just heats up

The water dept was here yesterday checking the meter. We had air in the pipes after, but all seemed okay. When I started the dishwasher, it made noise and I thought it was okay but after a while I noticed it sounded a little different. I opened it and realized that it was hot but there was no water in it. I cancelled the cycle and have since tried it a few more times with no luck. I poured some water in it and it drained fine. Could this have something to do with it resetting b/c air in the pipes or something? Thanks for the help!!!

The model number will be on the dishwasher itself, open the door and look around the frame.

Nat