I have an LG LDF7810 that is 6 1/2 years old. It has worked flawlessly until now. There is now a loud (compared to what it normally sounds like) continuous noise when the unit is running it's cycle. After the unit is turned on at the door is closed, it makes no noise for a couple minutes, then I hear three "ramp ups" that make the loud noise, then it goes continuous.
I hear water moving around inside the entire diswasher while this noise is going on, so it seems to be whatever motor is driving the unit during the core of it's cycle.
You will want to check to make sure that the diverter motor is good and that the pump is not causing the noise. You will want to check down inside the pump to make sure that there is nothing in the pump that would cause the noise to occur.
Answered by AppliancePartsPros.com | Tuesday, May 21, 2013