LG Refrigerator IS / 1S error
ErrorIS / 1S
IS / 1S is identified by LG support as ice-maker fan or ice-maker sensor connection problem. Follow the official, model-scoped checks and service boundary below.
What the code means
ice-maker fan or ice-maker sensor connection problem
Isolate the appliance when safe. Do not remove the ice-maker fan or sensor; contact LG repair service for the exact model. Do not open fixed panels or test live circuits.
Typical symptoms
01IS / 1S appears on the refrigerator display
02The affected refrigerator function may stop, pause, or behave abnormally
03The code returns when the same model-specific condition is present again
Likely causes
Start with the least invasive explanation and stop if the check requires internal electrical or sealed-system access.
01ice-maker fan or ice-maker sensor connection problem
02A model-specific condition must be confirmed against the exact manufacturer instructions
Safe next steps
- 1Record the complete IS / 1S display and the full LG refrigerator model
- 2Confirm that the displayed code matches the linked official LG source
- 3Do not remove the ice-maker fan or sensor; contact LG repair service for the exact model.
- 4Stop and arrange model-specific service if IS / 1S returns
Step-by-step repair
- 1Do not remove the ice-maker fan or sensor; contact LG repair service for the exact model. No internal component replacement is verified from IS / 1S alone.
Repair details
€Estimated cost
The published checks normally need no replacement part. Internal repair cost is model- and region-specific; obtain a written LG service quote after diagnosis.
The published checks normally need no replacement part. Internal repair cost is model- and region-specific; obtain a written LG service quote after diagnosis.
⏱Estimated time
External checks take about 5–30 minutes; professional diagnosis and repair time depend on the exact model.
External checks take about 5–30 minutes; professional diagnosis and repair time depend on the exact model.
🔧Tools
Exact LG model number and official manual, No internal electrical test tool is permitted
Exact LG model number and official manual, No internal electrical test tool is permitted
▣Spare parts
No replacement part is confirmed by IS / 1S alone. Confirm the exact model, failed component, and manufacturer part number before ordering.
No replacement part is confirmed by IS / 1S alone. Confirm the exact model, failed component, and manufacturer part number before ordering.
What not to do
- Do not open fixed panels, test live electrical or sealed-system parts, bypass safety devices, or order a component solely from IS / 1S.
Preventive maintenance
- 1Keep door seals, vents, condenser areas, and water connections accessible and follow the exact model maintenance schedule.
Frequently asked questions
What does IS / 1S mean?
LG identifies it as ice-maker fan or ice-maker sensor connection problem.
Can I replace a part from the code alone?
No. Confirm the exact model and manufacturer diagnosis first.
Did this fix your appliance?
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