Error Code PANTRY-DAMPER-HEATER-ERROR
Pantry compartment damper heater is burned out or disconnected
Moderate
Address soon - your appliance may not work properly
Also displayed as: F and R blink (pantry room damper heater error — item 27 in self-diagnosis list)
What This Means
Failed damper heater element; Open bimetal thermoprotector for pantry heater (same spec: off at 140°F/60°C); Disconnected wiring at CN40; PCB relay failure on Main PCB
What actually causes this:
The heater that prevents the pantry drawer damper from freezing shut has failed.
First Thing to Check
Check CN40 connector on the Main PCB for a secure, fully-seated connection.
Parts Involved
How to Fix
- 1
Disconnect CN40 from Main PCB
- 2
Measure resistance between CN40 pin 25 (Brown) and CN40 pin 27 (Black)
- 3
Expected: 135 Ω ±7%
- 4
0 Ω = heater shorted; ∞ Ω = open heater, bimetal, or broken wire
- 5
Check MICOM pin 91 voltage: at initial power on or heater off should be 3.5V to 4.8V; when heater is working output drops to 0V
- 6
If resistance is correct but heater does not activate, check PCB driver transistor and relay for CN40 circuit
Other Error Codes for RF28T5021S9
Refrigerator compartment temperature sensor is disconnected or dead
Internal humidity sensor has failed or is disconnected
Defrost sensor on freezer evaporator is failed or disconnected
Freezer fan motor is not running or not sending feedback
Supply voltage to compressor is too high
Freezer temperature sensor is failing or disconnected
Ice maker temperature sensor in freezer is failed or unplugged
External room temperature sensor is failed or disconnected