The loud humming noise can be due to the pump sticking if a piece of debris gets trapped in it or an intermittent fault on the pump capacitor or starter relay.
Check out these links below to get tutorials and advice on how to clean the pump or change the capacitor or relay which is cheap and simple job. How to replace Dishwasher pump Bosch Siemens etc Dishwasher Repair Manual Table of Contents http://www.ukwhitegoods.co.uk/help/fault-codes/dishwasher-fault-codes.html?start=25
I hope this helps
SOURCE: Loud Whining/Humming noise while washing
I've got the same issue with my whirlpool dishwasher, model GU1200XTLS. If I find out anything, I'll let you know. Have you received any insight?
SOURCE: Dishwasher is noisey when the pump is starts to pump water around
yes somthing /pice of somthing has gotten into the works;usually its a chunk of glass or small pice of plastic.no eazy way to fix.youl have to drain and go from the top down.[removing wash impeller pump cover and keep going down each time taking parts off and looking for some small hard somthing.im afraid youl end up going all the way down to the chopper/food grinder.leave the screws in the parts you take off so wont get mixed up.take your time.ive done it hundreds off times i know you can pull it off ,once.you can do it.ps you can let it run like that thru some loads to see if will grind up or clean its self out.knowing what i know i would have no problem trying that on my dish washer.and have done it a few times.hope that helps God bless,tom
SOURCE: Loud Humming noise every time we run the dishwasher
Hi, I had this exact same problem. In my situation it turned out to be the pump that pumps out all of the used water. It was rubbing up against the floor so that every time it turned on it made a loud vibrating sound. I just reached under the washer and put a piece of rubber between it and the floor and it solved the problem.
good luck!
I saw this post because I am considering buying the same model you have. Other than the noise problem you have, what do you think of it?
SOURCE: Maytag dishwasher.Loud humming noise, wash cyle,at beginning
Is the water filling up and then draining out? Mine did this and a part was broken inside the unit. The part was five dollars and called a lifter. I fixed it myself.
SOURCE: GU1500XTL loud humming sound during the cycle, getting louder
The run capacitor on the main wash motor needs replacing. Eventually it will just hum and overheat instead of rotating, so better replace it now before it overheats.
I doubt you can acces it easily yourself, as it may be away from the motor, and have to be tracked down.
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