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Samsung Ovens & Ranges

Error Code C-21

Oven temperature rises abnormally high

Moderate

Address soon - your appliance may not work properly

What This Means

DLB relay failure; Bake relay short; Broil relay short; Convection relay malfunction; Oven sensor issue; PCB pattern damage

How to Fix

  1. 1

    Disconnect power and Assy Display PCB

  2. 2

    Check DLB, Bake, and Broil relay (normal: infinity ohms)

  3. 3

    Check PCB pattern for damage

  4. 4

    Measure oven sensor resistance

  5. 5

    Check harness connection for oven sensor

  6. 6

    Verify CN100 to CN300 connector connection

  7. 7

    Replace relays if failed

  8. 8

    Replace Main PCB if pattern damaged

This Error Applies To

Samsung NE63T8511 Series Ovens & Ranges

Service manual exact match: NE63T8511**Service manual exact match: NE63BB8511**

Related Error Codes

C-d1

Door lock is misaligned

C-F0

Communication interrupted between Main and Sub PBA

C-F2

Communication interrupted between Main and Touch panel

C-20

Oven sensor open when oven is operating

C-d0

Short in the control key

C-22

Sub PCB sensor open when oven is operating

C-30

Main PCB sensor open when oven is operating

C-31

PCB temperature rises abnormally high

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