Hotpoint Oven Error Code F4 — Oven Temperature Sensor Shorted
What this means
The F4 error code on Hotpoint ovens means the oven temperature sensor (RTD sensor) is sending a reading that is abnormally low, indicating a short circuit in the sensor or its wiring. The control board interprets this as a sensor failure and prevents the oven from heating to avoid runaway temperatures. A damaged sensor probe, a pinched wire, or moisture on the connector can cause this code.
Step-by-step fix
4 stepsTest the oven temperature sensor
Turn off the breaker. Locate the temperature sensor probe inside the oven cavity (usually a thin metal rod at the upper rear wall). Disconnect the sensor's wire connector at the back of the oven and measure resistance. At room temperature, it should read approximately 1,080 to 1,100 ohms. A reading near 0 ohms confirms a short.
If the sensor reads correctly at room temperature but the code still appears, the short may be in the wiring between the sensor and the control board.
Inspect the sensor wiring
With the oven unpowered, trace the sensor wires from the back of the oven to the control board. Look for bare spots, pinched wires, or areas where insulation has melted from contact with hot surfaces. Repair or replace any damaged sections.
Sensor wires that pass close to the oven cavity wall can have their insulation degraded by heat over time.
Check the connector for moisture
Examine the wire connector where the sensor plugs in. If you see moisture, corrosion, or a green/white deposit, clean the pins with electrical contact cleaner and dry thoroughly.
Steam from cooking can migrate to the back of the oven and condense on electrical connectors.
Replace the temperature sensor
If the sensor reads 0 ohms, replace it. Remove the mounting screw from inside the oven, pull the sensor out, disconnect the wire, and install the new one. Restore power and test at 350 degrees.
Verify accuracy with a standalone oven thermometer after replacement.
When to call a professional
If the sensor and wiring both test good but the error persists, the control board's sensor input circuit may be at fault. A technician can diagnose the board.
Information compiled from manufacturer service manuals, official troubleshooting documentation, and appliance repair industry resources. This guide is for informational purposes only — always consult a qualified technician for complex repairs.
Learn more about our sourcesParts you may need
Oven Temperature Sensor (RTD)
Part #WB21X5301 · $10–$25
If the sensor reads near 0 ohms (shorted)
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