How do I fix error code R-1-6 on a Samsung refrigerators?

1. undefined: 1. Use self-diagnostic function to check error before power off 2. undefined: 2. Use manual defrost (3rd test mode) — press Power Freeze + Fridge for 8 seconds, then press key to select Fd mode 3. undefined: 3. Check defrost sensor temperature — should reach above 50°F (10°C) for refrigerator 4. undefined: 4. Measure R DEF heater resistance at CN72 #5 (White) to #3 (Orange) — should be 103/397 ohm ±10% (or 120 ohm ±10% for models without ice maker) 5. undefined: 5. Check for 0Ω (heater short) or ∞Ω (wire/bimetal open) 6. undefined: 6. If heater is normal, check relay and replace PCB if needed

Samsung Refrigerators2009–present

Error Code R-1-6

The fridge defrost heater is not working, which can cause frost buildup

Moderate

Address soon - your appliance may not work properly

Also displayed as: R-1-6 (LED blink pattern)

What This Means

Defrost heater housing separated; Heater contact error or disconnection; Heater short circuit; Temperature fuse error (bimetal); Defrost not completing within 80 minutes

What actually causes this:

The defrost heater burned out or the safety thermostat tripped and will not reset

First Thing to Check

Look for ice or frost buildup on the back wall inside the fridge — this confirms a defrost problem

Parts Involved

R Defrost HeaterBimetal ThermostatTemperature FuseMain PCB

How to Fix

1
1. Use self-diagnostic function to check error before power off
2
2. Use manual defrost (3rd test mode) — press Power Freeze + Fridge for 8 seconds, then press key to select Fd mode
3
3. Check defrost sensor temperature — should reach above 50°F (10°C) for refrigerator
4
4. Measure R DEF heater resistance at CN72 #5 (White) to #3 (Orange) — should be 103/397 ohm ±10% (or 120 ohm ±10% for models without ice maker)
5
5. Check for 0Ω (heater short) or ∞Ω (wire/bimetal open)
6
6. If heater is normal, check relay and replace PCB if needed

This Error Applies To

Samsung RF195AC Series Refrigerators (2009) (2009–present)

Service manual exact match: RF195ACService manual exact match: RF20HFENBService manual exact match: RF197ACService manual exact match: RF18HFENBService manual exact match: RF215ACService manual exact match: RF217AC