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Thank you for the question and your patience. Should you still need assistance for information purposes only...
My function is to give you honest information and not necessarily to tell you what you wish to hear. Please do not rate prematurely (negative).Initially,
this sounds is usually cause of clog air on water line and pump intake. Please try to watch this video on how to remove the air blockage. CLICK HERE
If still, sometimes you need to get rough on your machine in able to remove the clog air on water line. slamming the water tank into machine sometimes help. If still, unplug your machine, remove water and turn the machine upside down or shake your machine if possible.
Let me know if you still have questions.
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