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Error code reference

Caloric Range Error Code F4

Shorted oven temperature sensor circuit detected.

Caloric codesCaloric range codes

Shorted oven temperature sensor circuit detected.

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  • Step-by-step tests with expected resistance, voltage, and continuity values
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What F4 means on a Caloric range

The F4 error code on a Caloric range indicates that the oven temperature sensor circuit has been detected in a shorted condition. The oven temperature sensor, also called an RTD (Resistance Temperature Detector), is a probe mounted inside the oven cavity that monitors cooking temperatures and sends resistance-based signals back to the electronic control board. Under normal operating conditions, the sensor's resistance changes predictably with temperature, typically reading around 1080 ohms at room temperature. A shorted circuit means the resistance has dropped abnormally low, causing the control board to receive a signal that falls outside the expected range and triggering the F4 fault.

The short can occur within the sensor probe itself, within the wiring harness that connects the sensor to the control board, or at the connector terminals where the harness meets either component. Physical damage to the sensor wiring, pinched or burned wires from heat exposure inside the oven cavity, or corroded and contaminated connector pins can all create a low-resistance path that mimics a shorted condition. In some cases, moisture intrusion into the connector can also cause a temporary short that triggers the fault.

Diagnosing F4 requires disconnecting the sensor from the wiring harness and measuring the sensor's resistance with a multimeter at room temperature. If the reading is near zero or significantly below the expected range, the sensor itself is faulty. If the sensor reads correctly in isolation, the wiring harness or the control board input circuit should be inspected next for damage, shorts to ground, or failed components.

Source: manufacturer service documentation.

Common causes of F4

  1. 01

    Failed oven temperature sensor

    Part replacement

    The sensor probe itself has internally shorted, causing its resistance to drop far below the normal operating range. This is the most common cause and can be confirmed by measuring the sensor's resistance with a multimeter after disconnecting it from the wiring harness.

  2. 02

    Damaged or pinched sensor wiring harness

    Part replacement

    The wires running from the sensor to the control board can become pinched, melted, or burned from prolonged heat exposure inside the oven cavity, creating a short between conductors. Visually inspect the full length of the harness for any signs of heat damage, chafing, or bare wire contact.

  3. 03

    Corroded or contaminated connector terminals

    Wiring / connection

    Moisture, grease, or corrosion at the connector joining the sensor harness to the control board can create a low-resistance path that triggers a shorted circuit reading. Inspect the connector pins for discoloration, buildup, or damage.

  4. 04

    Faulty electronic control board

    Part replacement

    If the sensor and wiring both test within acceptable resistance values, the input circuit on the control board may have failed, causing it to incorrectly interpret the sensor signal as a short. This is a less common cause but should be considered after ruling out the sensor and harness.

See the test procedure for each cause

Frequently asked questions about F4

What does F4 mean on a Caloric range?
F4 on a Caloric range indicates that the oven temperature sensor circuit has been detected as shorted. The control board monitors the resistance from the temperature sensor probe inside the oven, and when that resistance falls abnormally low, it triggers the F4 fault. This prevents the oven from operating under unreliable temperature conditions. The fault points to the sensor itself, the wiring harness, or the connector as the most likely sources of the problem.
Can I fix the F4 error on my Caloric range myself?
A knowledgeable DIYer can often diagnose and resolve F4 by testing the oven temperature sensor with a multimeter and replacing it if the resistance reading is abnormally low or near zero. The sensor is typically accessible from inside the oven cavity and connects via a harness at the back wall. If the sensor tests correctly, inspecting the wiring harness for visible damage is the next step. Control board replacement is more involved and may warrant professional service.
Is it safe to use my Caloric range while the F4 code is showing?
It is not recommended to continue using the oven while F4 is active. A shorted temperature sensor means the control board cannot accurately monitor oven temperature, which could result in overheating or unpredictable heating behavior. The oven may also refuse to heat at all as a protective measure. Addressing the fault before resuming oven use is the safest course of action.
How much does it cost to repair an F4 error on a Caloric range?
If the oven temperature sensor is the cause, replacement sensors typically cost in the range of $20 to $60 for the part, and professional labor can add $75 to $150 depending on your location and service provider. If the control board is at fault, board replacement costs generally range from $150 to $350 or more for parts alone. Wiring harness repairs are usually less expensive but depend on the extent of the damage.
Will resetting my Caloric range clear the F4 error code?
Power cycling the range by unplugging it or turning off the circuit breaker for a few minutes may temporarily clear the F4 code, but it will return if the underlying fault in the sensor circuit has not been corrected. A reset does not repair a shorted sensor, damaged wiring, or a failed control board. Proper diagnosis and repair of the root cause is necessary to permanently resolve the fault.

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