F4
Stoves
Oven Temperature Sensor Circuit Shorted
Display shows F4 and oven will not heat or may shut down mid-cycle.
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
Shorted oven temperature sensor, Pinched or shorted sensor wiring harness, Moisture or contamination in sensor connector
How to Fix / Troubleshooting
Safety first: Turn off power at the breaker before removing panels.
Steps to check:
- Inspect wiring: Remove the rear panel and inspect the sensor wires for pinching against the cabinet or contact with sharp metal edges.
- Test sensor resistance: Disconnect the sensor and measure resistance at room temperature. A reading near 0 Ω indicates a shorted sensor; replace it.
- Check harness to chassis: With the sensor disconnected, check for continuity between each sensor wire and the metal chassis. Any continuity indicates a short to ground; repair or replace the harness.
- Dry connectors: If there are signs of moisture (from steam or spills), dry the connectors thoroughly and clean with isopropyl alcohol.
Warning: Do not bypass the sensor; this is a critical safety component that prevents overheating.
Advertisements
Repair Difficulty
Medium
3/5
Required Part
Oven Temperature Sensor (RTD)
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements