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HomeRepair HelpLG Dishwasher RepairLG Dishwasher not draining Repair
LG Dishwasher not draining
If your LG dishwasher is not draining and you’re left with standing water in the tub, start with the most common cause: clogged sump filters. A blocked coarse filter or fine filter in the sump can restrict water flow and lead to poor draining. Next, check the drain pump, since a failed pump motor or damaged impeller can keep the dishwasher water from draining through the drain hose. If the pump is getting power but not running, it needs to be replaced. Less often, an LG dishwasher not draining can be caused by a bad control board that is not sending power to the drain pump, a broken drain impeller, a failed drain solenoid kit that won’t open the drain valve, or a clogged or defective drain valve. These are all common reasons for a dishwasher clogged drain condition or a dishwasher drain pump not working complaint. Enter your model number on RepairClinic.com to find the exact LG replacement part for your dishwasher, whether you need sump filters, a drain pump, control board, drain impeller, drain solenoid kit, drain valve, or drain hose-related parts.
01 - Clogged Sump Filters
The sump assembly, located at the bottom of the dishwasher tub, contains the pump motor or motors to both circulate and drain the water. There are usually two filters in this assembly to strain food particles: a course filter and a fine filter. If the filters are clogged, the unit will get low water flow and poor washability. To clean filters, remove them from the sump and wash them with soap, warm water, and brush. If the filters are damaged, they should be replaced.
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02 - LG Dishwasher Drain Pump
The drain pump uses an impeller to force water through the drain hose. If the drain pump motor is not working, the dishwasher won’t drain. To determine if the drain pump is defective, check the pump motor for continuity using a multimeter. If the motor does not have continuity, or if is getting power but won’t run, replace the drain pump. Drain pumps are not repairable—if the drain pump is defective, you must replace it.
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03 - LG Dishwasher Control Board
A dishwasher's control board provides power to nearly every electrical component in the dishwasher. A faulty board may be unable to supply power to the drain pump, preventing it from drawing the water out of the tank and forcing it through the drain hose to the garbage disposal or sink drain pipe.
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04 - LG Dishwasher Drain Impeller
The drain impeller pushes water through the drain hose and into the garbage disposer or drain line. If the impeller is broken, replace it.
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05 - LG Dishwasher Drain Solenoid Kit
The drain solenoid opens the drain valve to allow the water to exit the dishwasher. If the drain solenoid fails the valve will not open causing the dishwasher not to drain.
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06 - LG Dishwasher Drain Valve
Over time, the drain valve can get clogged with debris. To ensure that water can flow through the drain valve, clean out the valve. If the drain valve is clear of debris but it still won’t actuate, replace it. Drain valves are not repairable—if the drain valve is defective, you must replace it.
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Frequently Asked Questions
Why is my LG dishwasher not draining and leaving standing water in the bottom?
How do I tell if the drain pump is bad on my LG dishwasher?
Can a clogged filter keep an LG dishwasher from draining?
What should I check before replacing the control board on an LG dishwasher that is not draining?
How do I find the right drain pump or drain valve for my LG dishwasher?
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