Error code
R6
Meaning
Water supply heater for ice maker is not working
Moderate
What to do
Why this happens
The problem could be due to a slipped-out water supply heater wire connector, contact error at the heater connector, wiring breakage within the heater circuit, or either a short or open circuit in the heater element.
How to fix it
Reconnect the heater connector if loose, or replace the heater element if resistance is zero or infinite
SourceSamsung service manual