WB20K10015 GE Oven Temperature Sensor is a cavity temperature sensing device used in GE range and wall-oven appliances. it is a two‑wire temperature probe, typically implemented as a thermistor-style sensor, that converts oven cavity temperature into a measurable electrical parameter (resistance) for the appliance control electronics.
Inside the appliance the sensor provides continuous feedback to the oven control board so the control algorithm can regulate heating elements,gas valves and convection fans to maintain set temperatures and execute timed cooking cycles. The sensor is normally mounted inside the oven cavity in a protective well or bracket and connects to the main control harness; its changing resistance is interpreted by the controller’s low-voltage sensing circuit and also contributes to diagnostic and safety functions such as over‑temperature detection and fault reporting.
In this article you will find a technical overview of how the WB20K10015 functions, how it interfaces electrically and mechanically with oven systems, typical symptoms of sensor failure, and practical troubleshooting steps technicians and owners can use (visual inspection, wiring and connector checks, resistance testing and interpretation). The article will also cover compatibility and replacement considerations-physical fit,connector type and harness length-as well as safe service practices to follow when replacing the sensor.
Table of Contents
- Function and Role of the WB20K10015 GE Oven Temperature Sensor in Temperature Regulation and Safety
- How the WB20K10015 GE Oven Temperature Sensor Works Within the Oven Control Circuit
- Common Failure Symptoms and Diagnostic Tests for oven Temperature Sensor Faults
- Compatibility, Replacement Procedure and Installation Considerations for WB20K10015 on GE Oven Models
- Q&A
- Wrapping Up
Function and Role of the WB20K10015 GE Oven Temperature Sensor in temperature Regulation and Safety
The WB20K10015 GE Oven Temperature Sensor is a thermistor-style probe that provides continuous temperature feedback to the oven control board. As temperature in the oven cavity changes the sensor’s resistance changes; the control board measures that resistance and converts it into a temperature reading used to modulate the heating elements. In normal operation the sensor enables the oven’s closed-loop regulation during preheat, bake, broil and self-clean cycles and helps the controller enforce safety limits by signalling when temperatures exceed design thresholds or when a runaway condition occurs.
- Primary function: provide accurate, repeatable temperature feedback to the control system.
- Behavior: negative temperature coefficient response (resistance decreases as temperature rises), read by the control board as an analog value.
- failure symptoms: oven will not reach or hold set temperature, uneven cooking, long preheat times, or temperature-related error codes/display faults.
- Compatibility/repair: replacement sensors must match the probe style,lead length,connector type and resistance characteristics required by the oven’s control board.
| Item | Description |
|---|---|
| Type | Thermistor (NTC) probe for oven cavity measurement |
| Location | Mounted through the oven cavity wall with sensing tip exposed to the cooking space |
| Service check | Measure resistance at ambient and with applied heat to confirm a monotonic decrease; replace if open or non-responsive |
For technicians and appliance owners, replacing a faulty sensor is a common corrective action that restores control accuracy and safety behavior; installation typically involves disconnecting a two‑wire harness and securing the probe to the cavity wall. Before replacing, verify the sensor’s electrical response with a multimeter and compare to the service documentation for the oven model; matching connector type and physical length prevents poor readings caused by incorrect placement or wiring. After replacement, confirm proper regulation by observing preheat time, steady-state temperature and any previously reported error codes to ensure the control system is receiving valid feedback.
How the WB20K10015 GE Oven Temperature Sensor Works Within the Oven Control Circuit
The WB20K10015 GE Oven Temperature Sensor is a two‑lead thermistor that provides the oven control board with a continuous temperature-dependent resistance signal. Mounted inside the oven cavity, the sensor’s resistance decreases or increases predictably as oven temperature changes, and the control board converts that resistance into a temperature reading used for bake, broil, and self-clean control loops. In practical systems the sensor forms part of a simple voltage divider or bridge input to the microcontroller or ADC on the control board, so its behavior under normal operation is linearized and compensated in firmware to maintain setpoint accuracy across the operating range.
Within the control circuit the sensor acts strictly as a passive feedback element: the board measures the voltage drop across the sensor and compares the calculated temperature against the selected setpoint, then drives the heating elements or relays accordingly. Common failure modes that affect control behavior are an open circuit (infinite resistance) producing a no‑temperature reading, a short (near zero resistance) producing an excessively low reading, or a drift in the resistance‑to‑temperature characteristic causing steady offset errors. Technicians typically verify sensor function with a multimeter (resistance vs. known oven temperature) or by observing the control board ADC values during a controlled temperature change before replacing the WB20K10015 GE Oven Temperature Sensor as a compatible, direct replacement component.
- Function: provides temperature feedback to the oven control board via a resistance change.
- Behavior in circuit: part of a voltage divider/ADC input; firmware converts resistance to temperature.
- Common diagnostics: check for open/short,measure resistance at ambient and elevated temperatures,compare to expected response curve.
| Item | Description |
|---|---|
| Type | Two‑lead thermistor (negative temperature coefficient) |
| Connection | Direct wired to oven control board input; passive feedback element |
Common Failure Symptoms and Diagnostic Tests for Oven Temperature Sensor Faults
The WB20K10015 GE oven Temperature sensor is a passive temperature probe (NTC thermistor style) that provides the control board with a resistance-based temperature signal; resistance decreases as the sensor is heated. In normal operation the control algorithm uses that signal to regulate bake and broil elements, so a sensor that is slow to respond, drifting, open, or shorted will produce symptoms such as long preheat times, failure to reach setpoint, frequent cycling, or temperature offsets between setpoint and actual cavity temperature. The sensor is mounted inside the oven cavity and connects to the control harness with two wires; verify model compatibility against the appliance parts list before replacing the probe to ensure connector and length match.
- Common symptoms: large temperature error (oven reads hot or cold compared with an autonomous thermometer), erratic element cycling, persistent fault codes referencing the temperature sensor, or no heat if the control interprets an open circuit as a safety condition.
- Visual and wiring checks: inspect the probe for physical damage, burned insulation, or corroded connector pins; confirm the harness and control board connector are secure before assuming a sensor failure.
- Resistance test: with the oven powered off and the sensor disconnected, measure resistance across the two sensor terminals. At room temperature the value should be near the sensor’s nominal spec; an open (infinite) reading indicates a broken element, and a near-zero reading indicates an internal short.
- Dynamic verification: warm the sensor (hot air or controlled heat source) while monitoring resistance – a functioning NTC sensor shows a smooth,predictable decrease in resistance as temperature rises. Compare measured values to the OEM spec sheet or the reference table below to decide on replacement.
| Item | Description |
|---|---|
| Typical resistance at ~25°C | Approximately 1.0-1.2 kΩ (check appliance specifications for exact value) |
| Open-circuit | Infinite/OL on multimeter – indicates broken sensor lead or internal failure |
| Short circuit | Near 0 Ω – indicates internal short and requires replacement |
| Response to heat | Resistance should decrease smoothly as sensor temperature increases (NTC characteristic) |
Use a digital multimeter for static resistance checks and, when practical, perform a live response test by observing resistance change while the oven heats (with appropriate safety precautions and with the sensor removed from live circuit when measuring resistance). If resistance values are outside the ranges shown in the reference table or the sensor fails to change resistance predictably with temperature, replacement of the WB20K10015 GE Oven Temperature Sensor is the practical next step; always confirm replacement part compatibility and re-check system behavior after installation to ensure proper closed-loop control.
Compatibility, Replacement Procedure and Installation Considerations for WB20K10015 on GE Oven Models
The WB20K10015 GE oven Temperature Sensor is a two‑wire thermistor that provides the oven control board with a temperature-dependent resistance signal used for closed‑loop temperature regulation. Compatibility depends on the sensor’s electrical characteristics (thermistor type and cold resistance curve), connector style, probe length, and mounting method; sensors with identical resistance vs. temperature curves and the same two‑pin plug and probe length will interchange without firmware changes, but mismatched lengths or different resistance curves will produce incorrect readings. Technicians should compare the sensor part number to the appliance’s service sheet and visually confirm the connector and mounting arrangement before ordering or installing a replacement to avoid inaccurate temperature control or fault codes on models with different control algorithms.
- Power off and disconnect mains before starting; verify no residual voltage at the control board.
- Access the sensor by removing the back wall or control panel as required by the model; take care not to stress the wiring harness.
- Unplug the sensor connector, remove any retaining clip or grommet, and pull the sensor probe free from its mounting; measure cold resistance with a multimeter and compare to the service specification.
- install the new WB20K10015, route the leads away from heating elements, secure the probe in the original clip or grommet, reconnect the plug, restore power, and verify oven temperature with an independant thermometer/thermocouple.
| Item | Description |
|---|---|
| Connector | standard two‑pin quick‑disconnect; must match oven harness for direct replacement |
| function | NTC thermistor providing resistance feedback to the control board |
| Common symptom | Erratic temperature,long preheat,or F‑temperature error codes |
| Basic test | Measure cold resistance and compare to the model’s service specification; check continuity on harness |
During installation,maintain the original probe position and routing so the sensor sees the same airflow and thermal gradients as designed; relocating the sensor even a few centimeters can introduce offset or hysteresis as local heat flux and convection differ. Secure the probe without over‑tightening fasteners or compressing ceramic insulation, avoid kinking or crushing the sensor lead, and confirm the grommet or seal is seated to preserve oven cavity insulation-after powerup run a verification cycle with an external thermometer and, if the control allows, perform a small calibration adjustment per the service manual rather than relying on trial and error. If replacement does not correct temperature errors, follow the diagnostic path: recheck harness continuity, verify the control board input impedance, and inspect for intermittent open/shorts at the connector before replacing additional components.
Q&A
What is the WB20K10015 oven temperature sensor and where is it located?
The WB20K10015 is the factory (OEM) oven temperature sensor used in many GE/Hotpoint/Kenmore electric ovens and ranges. It is a two‑wire probe mounted inside the oven cavity (usually on the back wall) and wired to the oven control board. Its job is to measure oven temperature and send that information to the control so the element cycles on and off to maintain the set temperature.
What are common symptoms of a failing WB20K10015?
Typical symptoms include ovens that run too hot or too cool, temperature that drifts or fluctuates widely, items baking unevenly, the oven failing to reach set temperature, or intermittent oven faults/lockouts. If the sensor is open, shorted, or giving erratic resistance readings, the control may display a sensor-related error or refuse to complete certain functions (check your model’s error-code list for specifics).
How do I test the WB20K10015 with a multimeter?
Always disconnect power before testing. Unplug the sensor harness at the back of the oven (do not test in-circuit). Set a digital multimeter to the ohms (Ω) range and measure across the two sensor terminals. At room temperature the sensor should read in the neighborhood of 1,000-1,200 ohms (approx. 1.1 kΩ); different sources list roughly 1,100 Ω as typical. The resistance should change smoothly when the probe is heated (for example, by a hair dryer) – if the meter shows infinite/open, a short (very low ohms), or no change with temperature, the sensor is bad and should be replaced.
Can I replace the sensor myself and how?
Yes, replacing this sensor is a common DIY task if you are pleasant working on appliances. Steps: 1) Disconnect power at the breaker. 2) Open the oven and remove racks. 3) Remove the small screws or retaining clip that secure the sensor to the back wall. 4) Pull the sensor forward enough to unplug the two‑pin connector inside the oven cavity or at the rear panel. 5) Swap in the new WB20K10015, plug the connector in, resecure the sensor, reassemble, and restore power. Take care not to over‑tighten the sensor mounting screw and avoid stressing the wires.
My oven is off by a few degrees – should I replace the sensor or just calibrate the oven?
If the oven is only slightly off (commonly a few degrees),you can try calibration/offset adjustment using the oven’s temperature calibration feature (consult your owner’s manual) before replacing the sensor. However, if the sensor resistance is outside the expected range, changes erratically, or the oven shows a sensor-related error, replacement is the correct fix. Calibration won’t help a sensor that is failing electrically.
How do I know this part is compatible with my oven model?
WB20K10015 is an OEM part used on many GE/Hotpoint/Kenmore electric ovens, but not every model uses the same probe. The only reliable way to confirm compatibility is to check your oven model number (usually on a tag on the oven frame or door) and verify the part number against the manufacturer’s parts list or a trusted parts supplier.Provide the full model number when ordering to avoid getting the wrong sensor.
Is it hazardous to replace the sensor and how long do these sensors last?
Replacing the sensor is not dangerous if you follow safety precautions: disconnect power before working, avoid contact with sharp sheet metal, and handle the probe carefully. The sensors are fairly durable and commonly last many years (often more than 5-10 years), but repeated heating/cooling cycles, wire insulation degradation, corrosion, or physical damage can cause failure. Typical replacement part cost is modest (usually in the $20-$60 range depending on supplier).
Wrapping Up
The WB20K10015 GE oven temperature sensor plays a central role in maintaining accurate oven operation by monitoring internal temperature and relaying that information to the control system. Its proper function supports consistent cooking results, efficient energy use and the prevention of overheating or temperature-related faults. As a key interface between the oven cavity and the electronic controls, the sensor contributes directly to appliance performance, safety and longevity.
Because a failing or out-of-spec sensor can cause uneven baking, error codes or needless component stress, accurate diagnosis and timely replacement are crucial. Confirming the sensor as the root cause-while also checking wiring and control components-and restoring the system with the correct replacement part helps return the oven to reliable operation.following manufacturer guidance or using qualified service ensures compatibility, safe installation and reduces the risk of repeat issues.
Professional Appliance Service
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Replacement parts for many appliance models can also be found at
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