Error Code F4
Lower oven sensor open — oven thermistor is open circuit
Moderate
Address soon - your appliance may not work properly
Also displayed as: F4
How to Fix
- 1
Unplug the unit.
- 2
Check sensor connector for looseness or disconnection at CN61 pins 5 and 6 of Main PCB.
- 3
Measure thermistor resistance — normal is approximately 1.09 kΩ at 75°F (25°C).
- 4
If resistance is infinite (open), replace the lower oven temperature sensor.
- 5
If resistance is normal, enter test mode and verify thermistor reading is between 70°F and 90°F at room temperature.
- 6
If test mode value is abnormal, replace the Main PCB.
- 7
Reconnect all wiring and test oven for normal operation.
Other Error Codes for LTG4715BM
Probe short — lower oven meat probe sensor is shorted
Lower oven sensor short — oven thermistor is shorted
Lower oven overtemperature — oven temperature exceeded 650°F continuously for 2 minutes during cooking (except self-clean)
Key short error — either 25 key short occurred 3 times in 90 seconds, or communication with Touch IC was impossible for more than 60 seconds
Upper oven sensor open — oven thermistor is open circuit
Upper oven overtemperature — oven temperature exceeded 650°F continuously for 2 minutes during cooking (except self-clean)
Convection fan not working
Lower oven door lock failure — door lock motor failed to reach locked or unlocked position during self-clean or lockout