Error Code C-21

Oven heating over - Overheating condition

What This Means

Defective oven sensor; Faulty heating elements (broil, bake, convection); Relay malfunction; Harness disconnection; Main PCB malfunction

How to Fix

1. 1

   Disconnect power and open back cover

2. 2

   Check oven sensor resistance (should be 1080Ω at room temperature)

3. 3

   Check broil, bake, and convection heater resistance values

4. 4

   Verify DLB, Broil, Bake, and Convection heater relays are working

5. 5

   Check all harness connections to main PCB

6. 6

   Measure Main PCB connector resistance with sensor unplugged

7. 7

   Replace sensor, heating elements, relays, or main PCB as needed

This Error Applies To

Samsung NY63T8751S Series Ovens & Ranges