How can I stop my hoover commodore washing machine from overfilling?

My machine will flood if on full load setting (but not on medium or small). Is there a switch/sensor that we can fix. It is a top loading model, Hoover commodore 792 (5.0 kg)
Trina, April 2005


done
there is a pressure switch, identfied by the slim tube running to it from the bottom of the tub

aa, April 2005
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