Error code · Refrigerator

LG Refrigerator Codes IS and 1S: Ice Maker Sensor

IS, or 1S, appears on LG refrigerators with an LED or LCD temperature display. The manufacturer's list itself writes it as IS or 15. It reports a problem with the ice maker fan motor or a…

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Code: IS, 1S
Appliance: Refrigerator
Brand: LG
Warranty: 30-day workmanship

What IS, 1S means

IS, or 1S, appears on LG refrigerators with an LED or LCD temperature display. The manufacturer's list itself writes it as IS or 15. It reports a problem with the ice maker fan motor or a disconnected ice maker sensor, and on the digital style panel it is an ice maker temperature sensor problem. The owner sees the code, and the ice maker may stop making ice while the refrigerator keeps cooling.

Common causes of IS, 1S

Ice maker fan motor
Ice maker temperature sensor
Wiring between the sensor and the control

✓ One safe check you can try

1. Check that the ice bin is seated. 2. Look for ice jammed around the ice maker. 3. Keep the freezer door closed so the temperature stays steady. 4. Request service, since no owner steps are listed for this code.

! Why to stop there

The code groups two possibilities, a fan or a sensor, and we cannot tell which from the display.
We test both and quote in writing first.
Freezer temperatures are checked as well.

Opening a panel yourself does not automatically cancel a manufacturer warranty, but it can cause accidental damage, and some manufacturers set their own service conditions. Check your warranty terms, or ask us, before deciding.

→Same appliance

Other Refrigerator codes

r2LG Refrigerator Code r2: Lower Compartment Sensor rFLG Refrigerator Code rF: Fresh-Food Fan Motor rSLG Refrigerator Code rS: Upper Sensor Open or Shorted rTLG Refrigerator Code rT: Room Temperature Sensor SbLG Refrigerator Code Sb: Sabbath Mode On Sd, CI, IU, d1, d2, d, H1, H2, US, LS, E1, E2, r, Id, gSLG Refrigerator Codes Sd, CI, IU and 12 Others: Self-Check Group SSLG Refrigerator Code SS: Pantry or Water Tank Sensor ttLG Refrigerator Code tt: Water Tank Not Detected

IS, 1SIS, 1S questions

Why does the code look like IS or 15?

The manufacturer's list prints it that way, since the letter I and the digit 1 look alike on a segment display. We treat IS, 1S, and 15 as the same ice maker code.

Will I lose food?

Probably not, since this concerns the ice maker, but check freezer temperatures with a thermometer. If the freezer softens, move food to a cooler and let us know.

Can I turn the ice maker off meanwhile?

Many models allow it from the panel or arm. The code may return until the cause is repaired, and we confirm which part is responsible with a written price before any work.

Book a visit

Still seeing IS, 1S?

A technician diagnoses it on site and gives you the price in writing before any work starts.

(713) 597-5662