Error Code 1
Freezer temperature sensor has failed or lost connection
Critical
Stop using immediately - risk of damage or safety issue
Also displayed as: Error 1
What This Means
Thermistor open circuit or short circuit; Connector CN31-5 or CN31-6 loose or disconnected; Wiring harness damage between sensor and Main PCB; Failed thermistor (502AT type)
What actually causes this:
The thermistor in the freezer has failed, or a wiring connection has come loose, so the control board cannot read the freezer temperature.
First Thing to Check
Open the freezer and look for a disconnected wire connector near the evaporator cover.
Parts Involved
How to Fix
- 1
Check voltage at MAIN PCB CN31-5 to CN31-6: should be between 1.0V and 4.5V
- 2
If voltage is 0V or 5V, disconnect connector and measure thermistor resistance — compare to temperature table
- 3
0 ohm indicates short trouble; infinite ohm indicates open trouble
- 4
Check connector seating at CN31
Other Error Codes for RF23M8590SR
Humidity sensor in the fridge compartment has failed
Ice bucket compartment heater has an open or short circuit
Mid drawer damper heater has an open or short circuit
Auto-fill water tank has detected an overflow
Refrigerator defrost sensor has failed or disconnected
Freezer defrost sensor has failed or lost connection
Ambient room temperature sensor has failed
Refrigerator compartment temperature sensor has failed or disconnected