Maytag MLG2000AWW Laundry center over fill

Came across this one today a Maytag MLG2000AWW Laundry center. the complain was water spilling out the door not draining…I arrived at the cosmetology school to find the tub half full of water and the water supply valves shut off. This washer runs 12hr a day 5 days a week.the customer had to turn the water off at the supply to keep the water from run…it was filling anytime the washer was on. I put the washer into spin and drained the water out . then I restarted the washer it filled, and keep fill went into wash but keep filling ..so I stopped the wash cycle and put it into spin…as soon as I started the spin cycle it started the drain pump and the water valves also opened.. so when ever the washer was on the water valves open…So it was time to open it up and check the pressure switch check the tube for so plugs or holes .. tube check out fine .. next I went to the control , the control in this unit is in the dryer top at the left hand side.. Control look OK.. so I when to start the washer again and it wouldn’t start had to hold the start button in to make it run. if I let go .. the washer would stop…So what do you guys think?