- Appliances
- Refrigerators
Er rS
LG Er rS on a refrigerator: upper fridge sensor fault
Risk level
Medium
Proceed carefully and stop if the check is unclear.
Urgency
Medium
Quick answer
LG says rS points to a fault in the fridge compartment temperature detection, at the upper sensor (R1). Unplug it for about 5 minutes and plug it back in; if rS stays, check the temperature with a thermometer and ask for an LG technician.
Safety first
Stop and check this first
- LG asks you not to disassemble or replace internal parts. The sensor is inside the compartment and connected to the board: if rS persists, stop using the fridge and call LG.
Safe checks you can perform
- 5 minute reset
- Actual compartment temperature
- Details for the technician
Leave these tasks to a qualified professional
- Do not attempt this professional task: R1 sensor measurement
- Do not attempt this professional task: Check after the repair
What a technician must be able to justify
A technician is coming
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.
R1 sensor measurement
What they doThe LG technician unplugs the fridge and measures the upper sensor and its wiring against the model's specification.
They must show youthe sensor's measured value against the specified one.
In writingthe cause and the replaced part, with its reference.
Check after the repair
What they doAfter the repair, the technician checks with a thermometer that the compartment holds its temperature and rS does not return.
They must show youthe compartment reading and the panel without the code.
In writingthe result.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Checks and evidence, step by step
Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
- 1
5 minute reset
No special tools
Procedure
- Who:
- you.
- How:
- unplug the fridge for about 5 minutes and plug it back in, following LG's guide.
- Result that matters:
- rS disappears.
- If it disappears:
- note the date; watch that it does not return.
- If it stays:
- LG asks you to contact support; do not take anything apart.
- Evidence to keep:
- a photo of the code before and after.
Evidence: How to Troubleshoot the Error Codes on Your LG Refrigerator
- 2
Actual compartment temperature
No special tools
Procedure
- Who:
- you.
- How:
- put an appliance thermometer in the upper part of the fridge and read it after a few hours with the door closed.
- Result that matters:
- knowing whether, despite the code, the fridge is at 40 °F (about 4 °C) or below, the CDC limit.
- If it is within range:
- cooling works; the fault may be in the reading only.
- If it is above or food is freezing:
- the control is cooling badly; protect the food and ask for a visit soon.
- Evidence to keep:
- a photo of the reading with the time.
Evidence: [LG Refrigerator] Digital and Analog Error Codes · Keep Food Safe After a Disaster or Emergency
- 3
Details for the technician
No special tools
Procedure
- Who:
- you.
- How:
- gather the model, serial number, the photo of rS and the thermometer readings.
- Result that matters:
- the technician knows whether the compartment over or under cools.
- If food in the fridge has ice on it:
- say so; it points to over cooling.
- If it is warm:
- say so; it changes the urgency.
- Evidence to keep:
- a list with readings and dates.
Evidence: How to Troubleshoot the Error Codes on Your LG Refrigerator
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Appliances
- Brand
- LG
- Product type
- Refrigerators
Known code variants
- E rS
- ER RS
- Er(E) rS
- Error rS LG
- LG refrigerator sensor rS
- LG rS error
- rS
- rS frigorífico LG
What it means
LG defines rS as a fault in the temperature detection system on the fridge side, at the R1 sensor in the upper part. With that reading in doubt, the control may over or under cool the compartment. LG's guide for this group asks you to unplug for about 5 minutes and plug back in; if the error persists, contact support, do not disassemble internal parts and stop using the appliance. LG puts these codes down to a faulty component, a control circuit or a disconnected wire: rS does not say which.
Warnings and stop conditions
- Mediumsource verified
LG asks you not to disassemble or replace internal parts. The sensor is inside the compartment and connected to the board: if rS persists, stop using the fridge and call LG.
Evidence: How to Troubleshoot the Error Codes on Your LG Refrigerator
Symptoms and causes
Probable causes · in order
- Failed R1 fridge sensorCommon
This is what LG lists for rS. It is only confirmed by measuring the sensor; a thermometer tells you whether the compartment cools properly meanwhile.
Evidence: [LG Refrigerator] Digital and Analog Error Codes
- Disconnected wire or control circuitPossible
LG includes these causes in its system code guide. The technician separates them from the sensor by checking the connection with the appliance unplugged.
Evidence: How to Troubleshoot the Error Codes on Your LG Refrigerator
Virtual technician
Does Er rS 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 Refrigerator] Digital and Analog Error Codes
LG Electronics · 2025 · official_doc
- 2
How to Troubleshoot the Error Codes on Your LG Refrigerator
LG Electronics · 2026 · official_doc
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