Hoover 705 , overfills and fllods laundry can it be fixed

On my hoover 200m (top loader) I had a similar problem. I turned off the machine & unplugged it. Closed water taps both hot & cold. Manually emptied machine with large cup. Undid bottom outlet hose by unclipping.The residual water will come out! I undid the 3 screws on the control panel. Tilted the control panel forward. The water level is manual control using a diagaphram pressure control to set water level. This had a hose. I disconnected both ends and used a bicycle pump to blow air thorough it. Underneath I disconnected where the hose goes into machine (clips) and also blew air from the top to check it was clear. After reconnecting everything the machine now does not stop filling and does not overflow anymore. Hope this helps.