If your LG dishwasher is not dispensing soap, start with the detergent dispenser parts most likely to fail. A broken dispenser lever is the most common cause, since it can keep the detergent door from opening or closing the way it should. Next, check the detergent dispenser cover for cracks, binding, or other damage that could stop the soap cup from opening during the cycle. After that, inspect the detergent container and dispenser lid for wear or breakage. If several dispenser parts look damaged, replacing the complete detergent dispenser assembly can be the simplest fix. In rarer cases, the control board may not be sending voltage to the dispenser, but that is much less likely than a failed mechanical part and should be checked last. If your LG dishwasher detergent dispenser not working problem is leaving soap behind or the dishwasher soap dispenser not opening, a close inspection of these parts usually points you in the right direction. Enter your model number on RepairClinic.com to find the exact LG replacement part that fits your dishwasher.
01 - LG Dishwasher Dispenser Lever
If the dishwasher dispenser lever is broken, it can cause the dispenser not to open or close properly. Inspect the dispenser lever for damage. If the lever is broken, replace it.
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The control board provides power to nearly every component of the dishwasher. If there is a problem with the control board, it might not send voltage to the detergent dispenser, preventing the dispenser from opening. However, this is not likely the case. Control boards are often misdiagnosed—make sure you check more commonly defective parts before replacing the control board