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if the old dispenser relay was melted or damaged replace control bd the power for the dispenser relay comes from main control and should only be at dispenser when called for in wash cycle ..the control bd is keeping the relay energized too long causing melt down
The LG does suffer from "poor quality" motor that causes this type of noise. The main motor and pump assembly is common to give this type of problem. The pump seal leaks a small amount of water that gets onto the front bearing and causes a "grinding = humming" noise. This can be easly replaced once you have the bottom off and dishwasher on its door. The motoe has 1 screw in the back holding the motor to the bottom and two rubber seals for the water pump in/out into the washer. Just pull and move motor and pump assmbly and it comes free. Replace with a new motor and pump assembly...
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.
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?
dear sir the problem you have sounds like the solenoid that opens the drain actuater can be worn out open the bottom panel run tru a cycle observe when the solenoid open it may be that there is something causing the solenoid to buzz either worn out or a wire or something in the way causing not to close proprly thanks from gilles
your model is pretty new. just so you know your warrenty is 1 year parts and labor. 2 years on parts. it should not cost that much money.
there are two components that start before the circulation pump.(wash noise you hear)
first sounds you hear will be the drain pump. usually rattling noises if something is in it but it can make a hum noise if something is jamming the drain propeller up. which is accessible with a T20 torx driver. take the filters out and the mesh filter. and unscrew the screw in the base towards the left. pull out whatever is lodged.
the other humming sound can come from the next component that activates is the watervalve. make sure you dont have a kinked water intake line. otherwise its a bad valve. i have had to change a few of those water valves out already but not for a hum noise on your model. you have a new style water valve. when brands make new parts we get problems fast sometimes..