PE
LG Dishwasher
Severity: CriticalWhat Does This Error Mean?
The PE error means your LG dishwasher's circulation pump has a problem. The pump that sprays water through the arms isn't working correctly. Without it, dishes won't be cleaned — the cycle stops.
Affected Models
- LDF5545ST
- LDFN4542D
- LDT5678SS
- Most LG built-in dishwashers
Common Causes
- The circulation pump motor has burned out or seized
- A broken piece of dish, bone fragment, or debris has jammed the pump impeller
- The pump wiring harness is loose or has a broken connection
- The main control board has failed and is not sending power to the pump
- Mineral scale buildup has restricted the pump over time
How to Fix It
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Turn off the dishwasher and unplug it from the wall.
Wait 5 minutes, then restart to rule out a temporary control board fault.
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Remove the bottom rack and take out the lower spray arm.
Unscrew or unclip it — refer to your model's manual for the exact method.
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Remove the filter assembly and look for debris in the sump area.
Glass shards, bones, or food debris can jam the pump impeller. Remove anything you find.
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Run a cleaning cycle using a dishwasher descaler or citric acid.
Scale buildup on the pump impeller can cause it to bind. A descaling cycle may free it.
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If PE returns after cleaning, the pump motor likely needs replacing.
Contact LG support or an appliance technician for a pump motor replacement.
When to Call a Professional
Pump motor replacement is not a DIY job for most people. The pump sits at the bottom of the dishwasher and requires significant disassembly. Expect repair costs of $150–$350 including parts and labor. A technician can also check whether clearing a jam resolves it before replacing the pump.
Frequently Asked Questions
What is the difference between PE and LE on LG dishwashers?
PE refers to the circulation pump (wash pump) motor. LE means the motor is electrically locked — it can't turn at all. Both relate to the pump system but indicate different failure points.
Can a jam in the pump clear itself?
Sometimes. Running a short rinse cycle after removing visible debris can free a minor jam. But broken glass or bone fragments usually need to be manually removed. Never run the machine repeatedly hoping a jam will clear — it damages the motor.
How long do LG dishwasher pump motors last?
Typically 7–12 years under normal use. Running cycles without water, or with heavy mineral scale, shortens pump life significantly. Regular descaling every 3 months extends pump and overall dishwasher life.