Samsung Oven moderate

C-21 Convection fan motor error

The Samsung C-21 error code on your oven indicates: Convection fan motor error. This typically requires troubleshooting the fan motor system.

Reported on: NE59M6850SSNE63A6511SS
Diagnosis

What Causes This Error

1

Fan motor failure

high

The motor has worn out or burned out and can no longer spin.

2

Debris blocking fan blades

high

Food splatter, grease buildup, or a loose item is preventing the convection fan from rotating freely.

3

Wiring connection issue

medium

The connector between the fan motor and control board is loose or damaged.

4

Control board not sending power

low

The PCB relay controlling the fan has failed.

Repair Guide

How to Fix Error C-21

  1. 1

    Power cycle the appliance

    Unplug for 5 minutes and plug back in. A temporary glitch may have triggered the error.

  2. 2

    Listen for the fan

    After plugging back in, listen near the fan location. If you hear grinding, clicking, or nothing at all, the motor or blades have an issue.

  3. 3

    Check for debris around the fan

    Remove the rear panel inside the oven cavity (usually held by a few screws). Look for grease buildup, food debris, or anything obstructing the fan blades. Clean with a damp cloth.

    Make sure the oven is completely cool and unplugged before accessing the fan area.
  4. 4

    Spin the fan by hand

    With the appliance unplugged, try rotating the fan blade. It should spin freely with slight resistance. If it's stiff or locked, the motor bearings are seized.

  5. 5

    Check wiring

    Disconnect and firmly reseat the fan motor connector at both the motor and the control board ends.

  6. 6

    Replace the fan motor

    If the motor is confirmed bad, order a replacement for your model. Most fan motors are held by 2-4 screws and a single wire connector.

Parts

Replacement Parts

If the steps above don't fix it, you may need one of these parts:

Convection Fan Motor

$40-$90
Amazon PartSelect

Cooling Fan Motor

$30-$70
Amazon PartSelect

When to Call a Professional

If the fan motor has been replaced but the error returns, or if you notice the oven is not heating evenly

  • Repeated fan failures can indicate a control board relay issue
  • A seized fan motor can sometimes indicate a deeper electrical fault
  • Accessing some convection fan assemblies requires significant disassembly of the rear oven wall
Video Repair Guide Search "Samsung oven error C-21 fix"

Models Affected

NE59M6850SSNE63A6511SS