Whirlpool dishwasher won't start. "Rinse only" light flashing. Two bars on "time remaining." When I push "cancel" the two bars go out, but "rinse only" keeps flashing. Door switch must be OK because when open the cancel button has no effect. Tried reset procedure with no effect. There may be one character missing from the model number. The label is marred. Correct model # is GU1500XTLS0. Do I need to replace the control panel?