ERROR CODE21EDiagnostic reference

Samsung · Refrigerators

Samsung refrigerator 21E: Freezer fan feedback is missing

THE SHORT ANSWER

Freezer fan feedback is missing.

21E means the control is not receiving expected freezer-fan rotation feedback. Door sealing and ice are relevant checks, but a fan failure is also possible.

First safe check

Check whether packages prevent the freezer door from closing fully.

Applies to

Samsung refrigerator families covered by the cited US guidance. Match the full model number and exact display; this is not an exact-model compatibility claim.

Before you start

Keep food protected while cooling is interrupted. Do not probe powered connectors, chip ice with a sharp tool, or open the sealed refrigerant system.

Go to safe checks

WHAT YOU MAY NOTICE

Symptoms to record

  • The refrigerator displays 21E.

WORK THROUGH THE BASICS

Safe troubleshooting checks

0 of 2 checked

Use the checkboxes to keep track as you read. Stop at any warning or step that does not match your appliance.

  1. Move obstructing items and check that the gasket meets the cabinet around the opening.

    What to note

    The freezer can close without a visible gap.

  2. Contact Samsung for service, or follow the model’s supported defrost instructions after protecting food. Do not chip ice or apply a heater.

    What to note

    Any icing is handled without damaging the appliance.

THE DETAILS MATTER

Scope & troubleshooting notes

How to interpret this result

A missing rotation signal does not prove the motor is electrically open. Tell service about ice, door gaps and any noise before the warning began.

YOUR NEXT DECISION

When to stop and get help

Arrange Samsung service if the condition remains after the listed owner checks, or if damage prevents completing them safely.

Record what you see

Keep the full model number, exact displayed code, and your observations together for the next conversation.

Use the right support

Contact the manufacturer or a qualified appliance technician when the guide calls for service.

Samsung support

THE EVIDENCE

Sources & verification

Our explanations are editorial summaries of the documentation below. They do not replace the instructions for your exact appliance.

  1. Samsung refrigerator error codes

    Samsung US · Manufacturer support · Checked

    Do not erase codes; 5E; 39E; 40E — Samsung US refrigerators

  2. Samsung refrigerator or freezer doors will not close

    Samsung · Manufacturer support · Checked

    Door seal and loading checks — Samsung US consumer support; check the model manual before applying a procedure.

  3. Common Samsung refrigerator error codes and their meaning

    Samsung · Manufacturer support · Checked

    Fan, Family Hub and power errors — Samsung Canada cross-reference to conditions independently confirmed by Samsung US.

ErrHive is an independent information resource, not an authorized representative of Samsung. Follow your appliance’s manual. Hazardous repairs belong with qualified professionals. Read our safety policy.