How do I fix error code HUMIDITY-SENSOR on a Samsung refrigerators?

1. undefined: Verify CN60 connector is fully seated 2. undefined: Measure voltage between CN60 pin 7 (W/YEL) and CN90 pin 8 — expect 1.0V to 3.5V (scaled from 909 mV at 0%RH to 3683 mV at 100%RH) 3. undefined: Disconnect and check resistance at CN60-7 to CN90-8; open circuit resistance ~50 Ω 4. undefined: Replace humidity sensor if reading is outside table values 5. undefined: If sensor is correct, check solder at R218 and consider replacing PCB

Samsung Refrigerators2020–present

Error Code HUMIDITY-SENSOR

Q: What does error code HUMIDITY-SENSOR mean on a Samsung refrigerators?

Internal humidity sensor has failed or is disconnected Failed HTG3515CH or HTG3535CH humidity sensor; Loose CN60 connector; Open or shorted sensor element (open circuit reads ~50 Ω); Bad solder at R218 (IC01 MICOM pin 8) on Main PCB

Internal humidity sensor has failed or is disconnected

Moderate

Address soon - your appliance may not work properly

Also displayed as: R blinks (humidity sensor indicator — CN60 item 13 in self-diagnosis list)

What This Means

Failed HTG3515CH or HTG3535CH humidity sensor; Loose CN60 connector; Open or shorted sensor element (open circuit reads ~50 Ω); Bad solder at R218 (IC01 MICOM pin 8) on Main PCB

What actually causes this:

The sensor monitoring humidity inside the refrigerator has stopped working — may affect the automatic moisture control in the crisper area.

First Thing to Check

Inspect the CN60 connector on the Main PCB — reseat it firmly.

Parts Involved

Humidity sensor (HTG3515CH or HTG3535CH)Main PCBCN60 connector

How to Fix

1
Verify CN60 connector is fully seated
2
Measure voltage between CN60 pin 7 (W/YEL) and CN90 pin 8 — expect 1.0V to 3.5V (scaled from 909 mV at 0%RH to 3683 mV at 100%RH)
3
Disconnect and check resistance at CN60-7 to CN90-8; open circuit resistance ~50 Ω
4
Replace humidity sensor if reading is outside table values
5
If sensor is correct, check solder at R218 and consider replacing PCB

This Error Applies To

Samsung RF28T5 Series Refrigerators (2020) (2020–present)

Service manual exact match: RF28T5101SR/AAService manual exact match: RF28T5A01S9/APService manual exact match: RF28T5021S9/EMService manual exact match: RF28T5001S9/MLService manual exact match: RF28T5021B1/COService manual exact match: RF28T5A01SR/AAService manual exact match: RF28T5021SR/AAService manual exact match: RF28T5001SR/AA