Troubleshooting LG dishwasher drain problems
Even dependable LG dishwashers can develop draining issues. Knowing what to check first can save time and help you identify the right repair.
Dishwasher won’t drain
If water remains in your LG dishwasher after a cycle, first check the kitchen sink drain to make sure it’s clear. If your dishwasher has an air gap, water or residue around the vent holes can indicate a clog. Clearing the air gap often restores proper drainage. You can also review our guide for troubleshooting dishwasher draining issues for more steps.
Drain pump not working
When the dishwasher’s drain pump doesn’t run or fails to pump water out, it likely needs to be replaced. The pump is responsible for pushing water through the drain hose and out of the machine. Replace the drain pump if it’s not operating correctly.
Control board not sending power
If the drain pump is working but still doesn’t receive power during the drain cycle, the electronic control board may be at fault. This board sends voltage to key components at the correct times. Replace the electronic control board if it fails to power the pump.
Common replacement parts for LG dishwashers
LG dishwashers use durable components, but certain parts are more likely to wear out over years of use.
- Detergent dispenser
- Drain pump
- Electronic control board
- Heater assembly
- Door latch
- Door switch
- Door seal
Find the exact replacement parts you need by using the LG dishwasher parts diagram for your model.
Get repair help
From draining issues to cleaning performance problems, our dishwasher DIY repair help section has troubleshooting tips and step-by-step guides for LG dishwashers.
LG dishwasher FAQs
My LG dishwasher is flashing an error code; what does it mean?
If your LG dishwasher is flashing an error code, it’s the machine’s way of telling you something isn’t working right. Each code points to a specific problem—like water not filling, a drain issue, or a sensor malfunction. To find out what your code means and how to fix it, check out our dishwasher error code chart.
Why won’t my dishwasher drain?
Standing water after a cycle can be caused by a blocked drain hose, clogged filter, or faulty drain pump. Clearing debris and replacing a damaged pump usually solves the issue.
Why is my LG dishwasher stopping mid-cycle?
A timer or control board problem may be interrupting the wash. Power loss from a faulty door latch can also stop the cycle unexpectedly.
What’s the best way to load my dishwasher?
Angle dishes toward the center, keep tall items on the sides, and avoid blocking spray arms. Mixing utensils in the basket prevents nesting and improves cleaning.
When should I replace my dishwasher?
If repairs exceed half the cost of a new unit, or the tub is cracked, replacement may be more cost-effective than continued repairs.