- Appliances
- Dishwashers
PE
LG PE on a dishwasher: water level sensor fault
Risk level
Medium
Proceed carefully and stop if the check is unclear.
Urgency
Medium
Quick answer
On some older LG dishwashers, PE means a fault in the sensor that detects the water level. LG gives no home steps for PE: it asks for a service inspection. Keep the model and a photo of the code at hand.
Safety first
Stop and check this first
- If water stays in the tub with PE, switch the unit off before bailing it out by hand: there is water next to mains powered components.
Safe checks you can perform
- Model and age of the unit
- What the unit does with PE
- Code for the service booking
Leave these tasks to a qualified professional
- Do not attempt this professional task: Level sensor check
- Do not attempt this professional task: Fill and drain test cycle
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Level sensor check
What they doWith the unit disconnected, the technician checks the level sensor, its connection and wiring and compares its reading with LG specification for the model.
They must show youthe check against specification and the condition of the connection.
In writingwhat was checked, the result and, if the sensor is replaced, its reference and the reason.
Fill and drain test cycle
What they doThe technician runs a cycle and checks that the unit fills and drains to the right level without PE.
They must show youa full cycle with no code.
In writingthe test, the result and the date.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Model and age of the unit
- Who:
- you.
- How:
- find the label with the model and serial number (the manual says where it is) and note the year of purchase.
- Result that matters:
- confirming it is one of the older models LG applies PE to.
- If it is an older model:
- the code fits the LG guide; request service with the model.
- If it is a recent model:
- tell the service, because LG only describes PE for certain older models.
- Evidence to keep:
- a photo of the label and the invoice if you have it.
Evidence: [LG Dishwasher] Guide to Error Codes
What the unit does with PE
- Who:
- you, by watching.
- How:
- note whether PE shows when filling starts, whether water stays in the tub or whether the unit stops empty.
- Result that matters:
- a concrete fact for the technician about how level detection fails.
- If water stays in the tub:
- do not force cycles, mention it when booking service.
- If it stops empty:
- note that too.
- Evidence to keep:
- a photo or short video of the panel and the tub.
Evidence: [LG Dishwasher] Guide to Error Codes
Code for the service booking
- Who:
- you.
- How:
- photograph the panel showing PE and note the date and the programme where it appeared.
- Result that matters:
- arriving at the appointment with the information the technician needs.
- If the unit is under warranty:
- say so when you request service.
- If PE clears by itself:
- still mention it; an intermittent reading fault can return.
- Evidence to keep:
- the dated photo and the programme note.
Evidence: [LG Dishwasher] Guide to Error Codes
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Appliances
- Brand
- LG
- Product type
- Dishwashers
Known code variants
- code erreur PE lave-linge LG
- codice PE LG
- código PE LG
- erreur PE LG
- error PE lavadora LG
- error PE lavavajillas LG
- errore PE lavatrice LG
- Fehlercode PE LG
- lavadora Samsung error PC
- lavavajillas Samsung error PE
- LG dishwasher PE
- LG dishwasher water level sensor PE
- LG PE
- LG PE dishwasher code
- LG PE lavavajillas
- LG Waschmaschine Fehler PE
- LG washer code PE
- P E
- PC
- PC1
- PE error LG washer
- PE1
- Samsung dishwasher error PE
- Samsung dishwasher PE
- Samsung lavadora PE
- Samsung lavavajillas PE
- Samsung PE clutch
- Samsung PE embrague
- Samsung PE half load
- Samsung PE media carga
- Samsung washer PE
- Samsung washing machine PC
- sensor nivel agua lavavajillas LG
What it means
The LG guide defines PE as a water level sensor error, the sensor that tells the control how much water is in the tub, and notes it applies to certain older models. Without that reading the control cannot manage filling and draining properly. LG says PE requires a service inspection. The code does not say whether the sensor, its connection or the board reading failed: the technician determines that by checking the sensor against specification.
Warnings and stop conditions
- Mediumeditorial warning
If water stays in the tub with PE, switch the unit off before bailing it out by hand: there is water next to mains powered components.
Evidence: [LG Dishwasher] Guide to Error Codes
Symptoms and causes
Probable causes · in order
- Failed level sensorPossible
It is the system LG names. Confirmed only when the technician finds that the sensor reading does not match the real level.
Evidence: [LG Dishwasher] Guide to Error Codes
- Sensor connection or wiringPossible
The code does not separate the sensor from its connection. It stands apart if the reading is correct again after checking connector and wiring, without replacing the sensor.
Evidence: [LG Dishwasher] Guide to Error Codes
Virtual technician
Does PE still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
- 1
[LG Dishwasher] Guide to Error Codes
LG Electronics · 2025 · official_doc
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