kenmore dishwasher 665.16374301 does not fill

HI, My dishwasher did not fill and clean the dishes the last time it ran. As I think about it, It seemed to be making a louder hum when it ran last but I thought it was my imagination. It appeared to run through all cycles as the green "clean" light was on. I went to remove the dishes and found that the detergent dispenser was open and detergent was still in the tank and door. I rolled out the lower dish tray and checked for water in the tub, none. I then tried spinning the lower spray bar and found it was stopped from spinning by one of the water heater element clamps which had been bent upwards, evidently from some utensil catching on it as the tray was rolled in. I bent the clamp back to its proper position and have tried the washer again, No luck. Tried a number of cycles, all seem the same, Getting a humming but no water, here are the details. normal wash button lit along with washing and sensing lights. lights stay on with on sound for about 1 min followed by lights on and low humming sound for about 1 min, followed by lights on with no sound for about a 1 minute followed by the humming sound for quite some time. opened door and found detergent dispenser open with detergent in tub. No water. Checked water supply - OK. Put about a gallon of water in tub, closed door and pressed drain/cancel - water drained and washer stopped. Any Help would be appreciated. John
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