GE Diswasher - Partial Drain

8 Month Old, Has worked Flawlessly. Now, Does not fully Drain and leave diry water in the bottom. I took off the exhaust hose and stuck it in a bucket to rule out disposal/sink drain. Same problem. The exhaust hose is still secured securley High to the top of the sinnk. Any Suggestions would be appreciated.

Check the sump for debris.
If OK then I would put in a service call.
Why should you mess with it when it is covered under warranty.