Error Code FZ
Flex-Zone temperature sensor is broken or disconnected
Critical
Stop using immediately - risk of damage or safety issue
Also displayed as: FZ LED blinks
What This Means
Sensor wire disconnected from CN40; Thermistor resistance out of range; Bad connection at sensor
What actually causes this:
Loose wire connection or failed temperature sensor
First Thing to Check
Unplug and check if CN40 connector is fully seated
Parts Involved
How to Fix
- 1
1. Measure voltage at MAIN PCB CN40-18 to CN40-20
- 2
2. Voltage should be between 4.5V and 1.0V
- 3
3. Check connector seating and wire integrity
- 4
4. Verify thermistor model 502AT
Other Error Codes for RF22R7351AZ
Freezer temperature sensor is broken or disconnected
Outside temperature sensor is not working
Ice storage room temperature sensor is not working
Flex Zone damper heater circuit is broken
Refrigerator temperature sensor is broken or disconnected
Freezer fan motor is not running
Control board IO expander chip is not working
Freezer defrost heater circuit is broken