The hum is coming from the drain pump which is trying to go. It will overheat the pump if you leave it like that too long. There is something inside the pump blocking it i.e. a clip, tooth pick, bra wire etc You need to manually drain the water out to lighten the weight of the machine. Use a small jug and scoop water out into the sink. When you have as much out as possible, pull machine forward & tip as far back against wall as possible. Look under on front right and locate pump. Try turning the propellor back & forward & see if it comes free. If it does, stand machine up & put on final spin & see if pump runs. If it won;t then pump will have to be taken out and obstruction removed by hand. Make sure power is off at wall socket while you are working underneath.
Lincoln Appliance NZ, October 2014