Can anyone assist. On start up, dishwasher pumps for a few seconds, then does nothing for at least 30 seconds, It then whirrs and water shoots in for 1-2 seconds then stops. Again does nothing, but after about a minute the motor kicks in, but no water in unit. I replaced side fill chamber as clogged, and drain pump as I believe can give signal to say water in if weak impeller, but made no difference.Quite used to the Bosch units, but stuck on this one. Any help appreciated.