F4
Gram
Oven Temperature Sensor Intermittent / Out of Range
Oven shows F4 and may not maintain correct temperature.
Advertisements
Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
Advertisements
Possible Causes
Aging or drifting oven sensor, Loose sensor connector, Intermittent wiring break, Faulty EOC analog input
How to Fix / Troubleshooting
Safety first: Isolate the appliance from mains.
- Wiggle test: With the oven cool and power off, gently move the sensor wiring while measuring resistance. Fluctuating readings indicate an intermittent break; replace the sensor and/or harness.
- Clean connectors: Disconnect the sensor plug at the rear or at the control board and clean contacts with electrical contact cleaner. Reconnect firmly.
- Compare resistance vs. temperature: If you have a thermometer, warm the sensor tip in a controlled way (e.g. in warm water, not connected to the oven) and verify that resistance changes smoothly. Replace if erratic.
- Replace EOC: If the sensor behaves correctly but F4 continues, the EOC may misinterpret the signal and should be replaced.
Warning: Do not immerse the sensor wiring in water; only the metal tip should be exposed during testing.
Advertisements
Repair Difficulty
Medium
3/5
Required Part
Oven Temperature Sensor
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements