I have checked that the plug is out of the desposal, I have confrimed the drain line in not clogged. When I disconnected the drain line into a bucket it seemd to work ok, but when connect it to the disposal or even just raise the height of the drain line the unit starts to to make a crackeling noise and the water stopps draining..any ideas??
It sounds like the impeller in the pump is getting loosae on the pump motor shaft and when it has to pump water any distance uphill when the hose is elevated it creates back pressure on the pump and this makes the impeller slip and make the crackling noise,you will need to replace the drain pump
SOURCE: LG LDF8812ST WONT DRAIN JUST INTERMITTENT BUZZ NOISE
Hi, there may be an obstruction in the pump housing that is causing the motor to freeze or, the impeller may be stripped and , jamming the pump. this will cause the hum you are hearing. the best way to inspect is to , extract the drain pump by, removing
the bottom drain filter housing or sump. manually
move the pump impeller to self it is moving freely. if the impeller is stripped, it will not be able to produce the draining surge necessary to pull the water out.
If the impeller is fine and, there are no obstructions visible, this will confirm pump failure.. replace the pump in this case
Some models have two impellers inside the pump - one, wash impeller,
takes care of the wash cycles, the other, drain impeller, drains the
water out. If the drain impeller is broken (broken blades, shaft), the
dishwasher would not drain. Replace any broken pump components.
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