Why is my display reading 1H and flashing occasionally?

"@kallile we really need to know what model this is. the H1 could possibly be an 1H which could make this a 1Hour delayed start. In the meantime try a reset and see if that changes anything. This should work for your machine:

Crack the door open by about 2 -3 inchesPress the ""Sani Rinse,"" ""Heated Dry,"" ""Sani Rinse"" and ""Heated Dry"" buttons on the control panel in quick sequence to enter diagnostic mode.Close the dishwasher door and engage the door latch.Wait 10 seconds before pressing the ""Cancel"" button to reset your dishwasher."