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Samsung Refrigerators2021–present

Error Code 66

Inverter board is too hot

Moderate

Address soon - your appliance may not work properly

Also displayed as: F/R

What This Means

Continuous high current operation; Ambient temperature too high; Inadequate heatsink cooling; IPM device or discrete IC overheating

What actually causes this:

Machine compartment is too warm or lacks proper airflow

First Thing to Check

Check that back of refrigerator has at least 2 inches clearance

Parts Involved

Inverter PCB with IPM heatsinkMachine compartment ventilation

How to Fix

  1. 1

    1. Check ambient temperature around machine compartment

  2. 2

    2. Ensure machine compartment has adequate airflow

  3. 3

    3. Measure IPM heatsink temperature

  4. 4

    4. Wait for temperature to cool before retry

This Error Applies To

Samsung RF22A4 Series Refrigerators (2021) (2021–present)

Service manual exact match: RF22A4221SG/AAService manual exact match: RF22A4121SG/AAService manual exact match: RF22A4110SG/AAService manual exact match: RF22A4220SG/AAService manual exact match: RF22A4111SG/AAService manual exact match: RF22A4010SG/AAService manual exact match: RF22A4221SR/AAService manual exact match: RF22A4121SR/AA+2 more

Related Error Codes

41

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44

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13

Humidity level cannot be monitored

33

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52A

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62

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26

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52

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