WD12X INDESIT WASH MODE STICKS ON 2?

THE WASH MODE STOPS 2 WITH WATER IN THE MACHINE THERE IS A GENTLE WASH MOTION.WHEN THE DIAL IS TURNED MANUALY TO 3 IT CONTINUES THROUGH THE PROGRAMES AT THE SPEED OF A SECOND CLOCK. I HAVE HAD THE PCB BOARD CHECKED BY QER BY POST AND THEY HAVE SUGGESTED CHECK /TACO OR THERMISTOR/TEMP SENSOR. AND THEY SUGGEST TO CHECK MOTO DOOR INTER LOCK PRESSURE SWITCH WIRING CONNECTIONS TO BOARD.ANY SUGGESTIONS ON REPAIR OR WHAT TEMP/SENSOR THEY MAY BE REFERING TO