134587700 Frigidaire Washer Control Thermistor is a temperature-sensing component used in Frigidaire washing machines; specifically, it is a thermistor-type temperature sensor whose electrical resistance varies predictably with temperature and that provides the control system with a measurable temperature signal.In appliance practice this part is typically a small two- or three-terminal probe or PCB-mounted device (commonly an NTC thermistor type) designed to withstand damp, chemically aggressive wash environments while providing a stable resistance-versus-temperature characteristic to the control electronics.
Within the washer, the thermistor supplies real-time temperature feedback to the main control module so the machine can select water-mix, time-to-heat or heater-on intervals, and temperature-sensitive cycle logic. The sensor’s signal is read by the control board’s analog input or ADC and is used to modulate heater operation (when present), verify that water has reached the target temperature, and help detect abnormal conditions.As it interfaces directly with the control electronics, wiring harness, and any onboard heater or temperature-regulation circuitry, its behavior affects cycle decisions, thermal protection routines, and certain diagnostic fault codes reported by the machine.
This article will explain the thermistor’s functional role and typical electrical characteristics, outline how to determine compatibility with specific machine models, describe common failure symptoms and diagnostic cues, and present practical troubleshooting and replacement considerations technicians and owners should use when evaluating the part. Coverage includes how the control interprets the thermistor signal, what to check on the harness and connector, common error-code associations and when a sensor swap is appropriate versus investigating the control board or related subsystems.
Table of Contents
- Function and Role of the Control Thermistor in the Frigidaire Washer Control System
- How the 134587700 Frigidaire Washer Control Thermistor Works Inside the Appliance
- Common Failure Symptoms and Diagnostic Indicators of a Faulty Thermistor
- Replacement Considerations, Compatible Models, and Installation Procedure for the 134587700 Thermistor
- Q&A
- Insights and Conclusions
Function and Role of the Control Thermistor in the frigidaire Washer Control System
The 134587700 Frigidaire Washer Control Thermistor is an electronic temperature sensor used by the washer’s control system to monitor tub or incoming water temperature. This thermistor is typically an NTC (negative temperature coefficient) device whose resistance decreases as temperature increases; the washer’s control board reads that resistance as a voltage or ADC input and uses the value to make real-time decisions such as valve sequencing for hot/cold mixes, heater activation (on models with internal heaters), and cycle timing adjustments. As the thermistor provides continuous analog feedback rather than a binary switch signal,small changes in resistance directly affect how the control calculates fill volumes and dwell periods during wash and rinse steps.
- Common symptoms of a failing thermistor: incorrect water temperature, extended fill or wash times, intermittent error codes, or failure of the heater/valving logic to engage.
- installation considerations: the sensor’s mounting location, connector type and resistance curve must match the control board; mechanical fit and wiring integrity are as crucial as electrical compatibility.
| Item | Description |
|---|---|
| Function | Provides a temperature-dependent resistance signal to the control board for temperature regulation and diagnostics |
| Typical diagnostic | Measure resistance with a multimeter at known ambient temperature and compare to service specifications; check for open/shorted leads |
When replacing or diagnosing the thermistor, confirm that the replacement matches the OEM resistance curve and connector pinout; identical-looking sensors can have different calibration curves that cause incorrect temperature readings even if they physically fit. Practical troubleshooting steps include inspecting the harness for corrosion or chafing,measuring resistance across the thermistor at ambient and after warming,and observing control behavior when the sensor is temporarily simulated with a resistor value within expected range.If the thermistor is open or shows wildly varying resistance, the control may log errors or default to safe behavior (skipping heater operation or adjusting cycle logic), so secure mechanical mounting and correct routing of the sensor lead are essential for reliable operation.
How the 134587700 Frigidaire Washer Control thermistor Works Inside the Appliance
The 134587700 Frigidaire Washer Control Thermistor is an NTC temperature sensor used by the washer’s control board to monitor water or tub temperature and provide an analog feedback signal for cycle control. As the temperature rises the thermistor’s resistance falls, and that resistance change is read by the control board as part of a voltage divider or ADC input.The board compares the measured value to expected setpoints and adjusts heater relays, valve timing, and cycle logic accordingly; such as, during a programmed “hot” wash the controller looks for the lower resistance that corresponds to the target temperature before advancing to the next step.
Compatibility requires an exact resistance curve and connector pinout because the control firmware interprets specific resistance-to-temperature mappings; substituting a thermistor with a different curve can produce incorrect temperature readings even if the part fits mechanically. Technicians typically verify the component by measuring resistance at known temperatures (room temperature and after exposure to warm water) and by inspecting the harness for shorts or opens. Practical replacement notes: ensure the sensor is mounted in the same location and thermal contact as the original so readings remain accurate, and follow manufacturer model-fit lists to confirm the 134587700 part is the correct OEM match for the specific Frigidaire washer.
- Common symptoms of failure: incorrect water temperature, heater running too long or not at all, or temperature-related error codes.
- Quick bench test: measure resistance at ~25°C and then at a higher known temperature; resistance should decrease with rising temperature.
- Installation tip: secure original mounting to preserve thermal coupling and verify connector seating to avoid intermittent readings.
| Item | Description |
|---|---|
| Sensor type | NTC thermistor (negative temperature coefficient) |
| Nominal resistance @25°C | Approximately 10 kΩ (typical OEM curve; verify against service data) |
| connector / location | Two-pin harness; mounted to control assembly or tub sensor boss depending on model |
Common Failure Symptoms and Diagnostic Indicators of a Faulty Thermistor
The 134587700 Frigidaire Washer Control Thermistor is a temperature-sensing device that provides the washer control board with a proportional resistance signal so the controller can monitor and regulate water temperature and heater operation. this part is typically an NTC sensor whose resistance falls as temperature rises; the control interprets that resistance to decide when to apply power to the heater,proceed between cycle phases,or log a temperature fault. Compatibility depends on the thermistor’s resistance‑vs‑temperature curve and connector type rather than just physical shape, so replacement must match the control board’s expected sensor curve or be verified by resistance measurements before installation.
- Control displays temperature-related error codes or aborts cycles.
- Water does not reach set temperature or heats continuously despite control commands.
- Cycle stalls, won’t advance, or behaves erratically during sensing steps.
- Multimeter shows open circuit or near-zero resistance across the thermistor leads.
- Intermittent faults correlated with vibration or moisture at the connector.
Diagnosis combines symptom observation with electrical testing: measure the thermistor resistance at a known temperature (room temperature and after exposure to warm or cold water) and compare to expected values for an NTC device – an open line indicates a broken sensor or connector, a near‑zero reading indicates an internal short, and a resistance that does not change with temperature indicates sensor failure. Also inspect the harness and connector for corrosion or broken wires, since intermittent connections ofen produce the same control reactions as a failed thermistor. Use the example resistance references below only as a sanity check and consult the washer’s service documentation for the exact curve required by the control.
| Item | Description |
|---|---|
| Example resistance at 25°C | Approximately 10 kΩ (typical NTC example; verify against service data) |
| Behavior when faulty | Open circuit, short circuit, or resistance that does not vary with temperature |
Replacement Considerations, Compatible Models, and Installation Procedure for the 134587700 Thermistor
The 134587700 Frigidaire Washer Control Thermistor is a temperature-sensing component that provides the washer control board with a variable-resistance signal corresponding to water or ambient temperature. The thermistor is typically an NTC device, so its resistance falls as temperature rises; the control board interprets that resistance change to manage heater operation, enthalpy-sensitive cycle timing, and fault detection. Technicians verify thermistor behavior with an ohmmeter by observing a smooth, monotonic decrease in resistance as the sensor is warmed; abrupt open circuits, short circuits, or a flat (unchanging) resistance indicate a failed sensor or wiring fault that will lead to temperature-related errors or improper heater cycling.
Compatibility depends on physical mounting, connector type, and the resistance-versus-temperature curve expected by the control board, so always cross-reference the OEM part number and service manual before replacement. Typical installation considerations include: disconnecting power,accessing the control/tub mounting point,noting harness orientation,recording the old sensor’s resistance at a known temperature for comparison,and confirming secure connector engagement and routing to avoid chafing. After replacement, validate the new thermistor by measuring resistance at ambient and after a controlled warm-up, then run a diagnostic or a short wash cycle to confirm correct heater control and absence of temperature-related fault codes.
- Pre-install checks: power off, compare part numbers and connector pinout, inspect harness for damage.
- diagnostic steps: measure resistance at known temperatures, confirm NTC behavior, and verify continuity to the control board.
- Post-install tests: perform a diagnostic cycle and monitor the heater control and temperature feedback.
| Item | Description |
|---|---|
| Function | Provides variable-resistance temperature feedback to the washer control board |
| Compatibility | Requires matching connector, mounting, and resistance curve; confirm with OEM parts list |
Q&A
What is the 134587700 Frigidaire washer control thermistor?
The 134587700 is a temperature-sensing component (thermistor) used in some Frigidaire washing machines. It monitors water or internal component temperature and sends a resistance-based signal to the washer’s control board so the machine can regulate heating, cycle timing and safety functions.
What symptoms indicate the thermistor may be bad?
Common symptoms include incorrect water temperature during cycles, wash cycles taking too long or too short, clothes not getting properly cleaned on temperature-sensitive cycles, and temperature-related error codes displayed by the machine. You may also see the heater not turn on (on models with a heater) or the washer frequently tripping fault codes related to temperature sensing.
Where is the thermistor located in the washer?
Location varies by model but the thermistor is typically mounted near the heater assembly or clipped to the inner tub so it senses water temperature directly. On some machines it is indeed part of or adjacent to the control assembly. Consult your model’s service manual or parts diagram for the exact location.
how do I test the thermistor with a multimeter?
1) Unplug the washer and disconnect the thermistor harness from the control. 2) Set a digital multimeter to the ohms (Ω) range. 3) Measure resistance across the thermistor terminals at room temperature – you should get a finite resistance reading (not infinite/open or near zero short). 4) Apply heat (warm water or your hand) and watch the resistance: an NTC thermistor’s resistance should decrease as temperature rises. 5) If the resistance does not change with temperature, reads open, or is shorted, the thermistor is faulty. Note: exact ohm-per-temperature values vary by part; check the service manual or manufacturer data sheet for the specific resistance/temperature curve if you need precise numbers.
Do I need any special tools or safety steps to replace it?
Basic hand tools (screwdrivers, nut drivers) are typically sufficient. Always unplug the washer from power before starting work, and if you must work near water lines drain and turn off the water supply. Avoid working on a wet machine and keep connectors dry. If the thermistor is near the heater, allow the unit to cool before touching components.
Is the 134587700 thermistor a direct replacement part for my model?
Compatibility depends on your exact washer model. The safe approach is to compare the part number against the parts list for your model or enter your washer’s model number on the manufacturer or authorized parts supplier website. Do not assume interchangeability unless the parts list or supplier confirms the 134587700 is listed for your model.
Can the thermistor be repaired or should it be replaced?
Thermistors themselves are inexpensive and not serviceable – if the sensor is faulty it should be replaced. Though, check wiring and connector pins for corrosion or damage before replacing the sensor; sometimes the problem is a wiring harness failure or poor connection rather than the thermistor element.
After replacing the thermistor, do I need to recalibrate the washer or reset the control?
Most machines will recognize the new sensor automatically and require no special calibration. It’s a good idea to unplug the washer for a minute or perform a factory or diagnostic reset per your service manual after replacement.If the machine still shows temperature-related errors after installing a known-good thermistor, inspect wiring, harness connectors, and the control board input circuit for faults.
Insights and Conclusions
The 134587700 Frigidaire Washer Control Thermistor functions as a temperature-sensing element that communicates water or system temperature to the washer’s control board. By providing accurate thermal feedback, it helps the machine select the correct heating and cycle parameters, protect components from overheating, and ensure consistent wash performance and fabric care. Reliable thermistor readings thus contribute to energy efficiency and overall appliance safety.
As temperature feedback is integral to multiple washer operations, symptoms such as incorrect water temperature, cycle errors, or unexpected interruptions warrant a careful diagnosis of the thermistor and related control circuitry. Proper diagnosis typically involves verifying error codes, measuring thermistor resistance versus expected values, and inspecting connectors and wiring. When testing indicates failure, replacing the component with the correct 134587700 part and following manufacturer service procedures helps restore proper function and avoids unnecessary replacement of other parts.
Treating thermistor issues promptly and methodically minimizes downtime, prevents collateral damage to heating and control components, and helps maintain the washer’s efficiency and longevity. For those unsure of diagnostic or replacement steps, consulting the appliance manual or a qualified technician ensures the work is performed safely and in accordance with Frigidaire specifications.
Professional Appliance Service
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