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Samsung Refrigerators2019–present

Error Code 91

Fridge compressor not getting enough power

Critical

Stop using immediately - risk of damage or safety issue

Also displayed as: 91Er

What This Means

DC bus voltage too low; Inverter output voltage dropout; Power supply failure; Loose power connector

What actually causes this:

Power supply is weak or has a loose connection

First Thing to Check

Check that all power connections at the back are tight

Parts Involved

Inverter PCBSMPS Power Supply

How to Fix

  1. 1

    Measure DC bus voltage on inverter PCB

  2. 2

    Voltage should be above DC15V minimum

  3. 3

    Check power supply output

  4. 4

    Verify all power connectors

  5. 5

    Test for intermittent power

This Error Applies To

Samsung BRF425200AP Series Refrigerators (2019) (2019–present)

Service manual exact match: BRF425200AP/AA

Related Error Codes

9

FlexZone compartment sensor failed

7

Pantry compartment temperature sensor failed

13

Outside humidity sensor is broken

6

Outside temperature sensor is broken

11

FlexZone defrost sensor is not working

2

Fridge temperature sensor is broken or disconnected

5

Fridge defrost sensor is not working

1

Freezer temperature sensor is broken or disconnected

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