134587700 Frigidaire Washer Control Thermistor is a temperature-sensing resistor used in Frigidaire washing machines to provide the control electronics with a temperature-dependent signal. As a thermistor, its electrical resistance changes predictably with temperature; that change is read by the washer’s control board and used as an input to the machine’s control logic. The component is typically a small, two‑wire sensor mounted where it can accurately sense wash tub or heater temperatures rather than a power-handling part.
Inside the appliance, the thermistor supplies real‑time temperature feedback that the control module uses to sequence heating elements (when present), select appropriate wash cycles, manage water fill and spin profiles, and implement temperature‑related safety interlocks. It interfaces directly with the main control board through a harness and is part of the feedback loop with the heater, inlet valves, and cycle controller.Because it is a sensing component rather than a switching device, failures generally produce incorrect temperature readings or open/short conditions that the control electronics interpret as sensor faults.
In this article you will find a focused technical review of the thermistor’s function and typical electrical behavior, guidance on checking compatibility with specific frigidaire models and harnesses, common failure symptoms and diagnostic cues, practical troubleshooting methods (multimeter checks, wiring and connector inspection, and sensor placement considerations), and pragmatic replacement considerations including safety precautions and verification steps. The goal is to give technicians, engineers, and informed appliance owners the context and procedures needed to diagnose sensor issues and make informed decisions about repair or replacement without speculative or promotional content.
Table of Contents
- Functional Role and electrical Characteristics of the Washer Control Thermistor
- How the 134587700 Frigidaire Washer Control Thermistor Works Inside the Appliance
- Common Failure Symptoms and Diagnostic Multimeter Readings for Thermistor Faults
- Replacement Considerations,Compatibility Notes,and Step-by-Step Installation for the Control Thermistor
- Q&A
- To Conclude
Functional role and Electrical Characteristics of the Washer Control Thermistor
The 134587700 Frigidaire Washer Control Thermistor functions as the temperature-sensing element for the washer’s control system,converting temperature into a variable resistance that the control board reads to manage heating and cycle logic. This part is a NTC (negative temperature coefficient) thermistor, so its resistance decreases as temperature increases; the control board typically measures that resistance as part of a voltage divider to determine water or tub temperature.In practical operation, accurate thermistor readings allow the board to engage the heater, select appropriate wash profiles, and time soak or rinse steps; an out-of-spec resistance curve will cause incorrect temperature regulation even if the heater and wiring are or else good.
- Common failure symptoms: persistent incorrect water temperatures, repeated temperature-related error codes, extended heating cycles, or heater not enabled despite power present.
- Basic field check: with the thermistor disconnected, measure DC resistance at ambient and then warm the sensor (hot water or heat gun at low setting) to confirm resistance falls with rising temperature.
- Replacement consideration: confirm connector type, mounting orientation, and the thermistor resistance curve against the service manual-mismatched curves can produce systematic temperature offsets.
Compatibility for the 134587700 Frigidaire Washer Control Thermistor depends on matching the electrical characteristics (resistance vs. temperature curve) and mechanical interface to the original component; many control boards expect a specific curve rather than a single nominal resistance value. Technicians should verify the part number against the washer’s model/service literature, inspect the harness and connector for corrosion, and test both the thermistor and wiring from the sensor back to the control board to isolate faults. As the thermistor is a passive, low‑power component, issues are most frequently enough due to degraded sensor material, poor thermal contact, or wiring faults rather than electronic failure in the control board.
| Item | Description |
|---|---|
| Sensor type | NTC thermistor; resistance decreases as temperature rises |
| Electrical interface | Passive two‑lead device read by control board voltage divider |
| Field test | Measure resistance at ambient and while warming; resistance should decrease smoothly with temperature |
How the 134587700 Frigidaire Washer Control Thermistor Works Inside the Appliance
The 134587700 Frigidaire Washer Control Thermistor is a temperature-sensing component used by the washer’s electronic control to monitor wash and rinse water temperature.It is indeed a NTC thermistor, meaning its electrical resistance decreases as temperature increases; the control reads that resistance change through a voltage-divider or ADC input to determine current water temperature. Physically it is mounted where it can sense water or tub temperature (ofen in the tub or near a heater assembly) and connects to the main control harness with a small two-wire plug so the control can apply the proper wash algorithm and heater duty cycle based on real-time temperature feedback.
- Erratic or incorrect water temperature readings reported to the control
- Long heating cycles or cycles that never reach target temperature
- Control-generated error codes related to temperature sensing
- Intermittent operation caused by poor connector contact or open/short thermistor
Behaviorally, the thermistor must match the control’s expected resistance-versus-temperature curve; replacement with an incorrectly specified sensor can produce systematic temperature errors even if the part physically fits. Troubleshooting typically involves verifying connector and harness integrity and measuring the thermistor’s resistance while changing its temperature (for example, in warm water) to confirm the resistance decreases smoothly with rising temperature. In practice, technicians compare measured values to the service specification or swap with a known-good unit; if the control still shows faults after a verified-good thermistor and good wiring, the fault may lie in the control board input circuit rather than the sensor itself.
| Item | Description |
|---|---|
| Type | Negative Temperature Coefficient (NTC) thermistor used for temperature sensing |
| Function | Provides a resistance-based temperature signal to the washer’s electronic control |
| Location | Mounted in tub area or near the heater to sense water/tub temperature |
| Connector | Two-wire plug into the main control harness; wiring and contact condition affect readings |
| Diagnostic test | Measure resistance while warming/cooling; resistance must change smoothly with temperature |
| Replacement note | use an OEM or matching-spec thermistor to ensure the control’s temperature algorithm performs correctly |
Common Failure Symptoms and Diagnostic Multimeter Readings for Thermistor Faults
The 134587700 Frigidaire Washer Control Thermistor is an NTC (negative temperature coefficient) temperature sensor mounted near the tub or heater assembly to provide the control board with a precise temperature feedback. It is a passive resistance device: resistance falls as temperature rises, and the control logic uses that value to decide water heating, soak timing, and cycle termination. In compatible Frigidaire washer models this thermistor replaces or interfaces directly with the main control harness, so mechanical fit and connector pinout must match the original part for correct operation; an otherwise identical sensor with a different resistance curve can cause incorrect temperature readings and unexpected cycle behavior.
Technicians commonly diagnose thermistor faults with a digital multimeter on the ohms scale. With the thermistor disconnected from the harness, a stable resistance reading at a known ambient temperature that changes smoothly as the sensor is warmed or cooled indicates a functioning device. Readings of a very high/infinite resistance (open circuit) or near-zero ohms (short) indicate failure. Below are typical symptoms to watch for and a quick reference table of approximate resistance values for a common 10 kΩ NTC curve; confirm exact values with the washer’s service manual before replacing the part.
- Washer runs excessively long or never reaches set temperature;
- Heater cycles on and off erratically or does not energize;
- Control displays temperature-related fault codes or aborts cycles;
- Multimeter shows open circuit or no measurable change when warming the sensor.
| Item | Description |
|---|---|
| 0 °C | ≈ 28.7 kΩ (example for a 10 kΩ NTC) |
| 25 °C | ≈ 10.0 kΩ (typical reference) |
| 40 °C | ≈ 5.8 kΩ |
Replacement Considerations, Compatibility Notes, and Step-by-Step Installation for the Control Thermistor
The 134587700 Frigidaire Washer Control thermistor is a temperature-sensing element used by the washer control board to monitor tub or inlet water temperature and to regulate heater and cycle logic. It is a passive NTC-style sensor whose electrical resistance falls as temperature rises; the control interprets the resistance change and adjusts heater timing or cycle decisions accordingly. When assessing compatibility, match the mechanical mounting, connector type, and temperature range rather than only part numbers-many newer or cross-referenced thermistors will function electrically but can fail if the harness connector, mounting boss, or response curve differs from the original, producing incorrect temperature readings or diagnostic faults.
Replace the thermistor when you observe temperature-related error codes, inconsistent water temperature during cycles, or when an ohmmeter shows no change in resistance with controlled temperature changes.For replacement and installation:
- Disconnect power and water supply before starting.
- Access the sensor location (usually at the tub or inlet assembly) and note connector orientation and any retaining clips.
- Remove the old sensor,unplug the harness,and compare the new thermistor’s connector and mounting to ensure a direct fit.
- Install the new sensor, secure clips, reconnect the harness, and restore power for testing.
- Verify operation by measuring resistance across the thermistor while changing temperature or by running a diagnostic cycle and observing temperature readings or heater control behavior.
| Item | Description |
|---|---|
| Part | 134587700 Frigidaire Washer Control Thermistor – OEM-designated replacement sensor |
| Type | NTC thermistor (resistance decreases as temperature increases) |
| Connector | Two-pin harness; ensure pin shape and latch match the washer harness |
| Common symptoms | Temperature error codes, heater not engaging, incorrect cycle temperature reporting |
Q&A
what is the 134587700 Frigidaire washer control thermistor and what does it do?
The 134587700 thermistor is a temperature sensor used by the washer’s control board to monitor water or tub temperature. It is typically an NTC (negative temperature coefficient) thermistor - its resistance falls as temperature rises. The control uses the sensor reading to manage wash cycles, water heating (if equipped) and to detect temperature-related faults.
What symptoms indicate the thermistor might potentially be failing?
Common symptoms include incorrect water temperature during cycles, the washer skipping certain temperature-dependent steps, intermittent or persistent temperature-related error messages (check your model’s service manual for exact codes), longer cycle times, or the washer refusing to advance. In certain specific cases a failed thermistor can cause the control to default to a safe mode.
How do I test the thermistor with a multimeter?
Disconnect power and access the thermistor connector. With the thermistor removed or isolated from the circuit, measure resistance with an ohm meter at room temperature - you should get a finite value in the kilo‑ohm range and the resistance should change when you warm or cool the sensor (resistance decreases as temperature increases). For exact resistance vs. temperature specifications consult the washer’s service manual; if the sensor reads open (infinite) or does not change with temperature, it is indeed faulty.
Is part 134587700 compatible with my Frigidaire washer model?
Compatibility depends on the exact washer model and production variation. Verify compatibility by checking your washer’s model number against the Frigidaire parts list, the part seller’s compatibility table, or the official service manual/parts diagram. Do not rely solely on visual similarity - confirm the OEM part number or approved replacement list.
Can I replace the thermistor myself and what are the basic steps?
Yes, a competent DIYer or technician can replace it. Basic steps: unplug the washer, locate the thermistor (often on the tub or control board area), note wire orientation, disconnect the wiring harness, remove the old thermistor, install the new unit, reconnect the harness, and reassemble panels. Always follow safety precautions (power off and unplug) and refer to the service manual for model-specific access and fastening details.
Do I need to calibrate or program the control after replacing the thermistor?
No separate calibration is normally required. The thermistor is a passive sensor and the control board reads its resistance directly. After replacement, run a diagnostic or a cycle to confirm the new sensor reports temperature correctly and that any previous error codes clear. If your model requires any service mode entry to clear codes, follow the service manual instructions.
What commonly causes thermistor failure and how can I prevent it?
Failures are commonly caused by moisture intrusion, corrosion on connectors, physical damage, overheating or electrical surges, and degraded wiring. Preventive steps include keeping connectors dry and clean, inspecting and repairing damaged wiring or harnesses, ensuring proper installation and strain relief, and avoiding exposing the control area to steam or excessive moisture.
How much does the 134587700 thermistor cost and how long does replacement usually take?
Prices vary by seller and whether the part is OEM or aftermarket, but thermistors for washers typically range from about $10-$60. Replacement time depends on model accessibility; for many machines a qualified homeowner or technician can complete the swap in 15-45 minutes, while some models requiring more disassembly may take longer. Labor costs will increase if you use a service technician.
To Conclude
The 134587700 Frigidaire washer control thermistor is a critical sensor that measures water temperature and communicates that information to the washer’s control electronics. accurate temperature sensing ensures correct cycle selection and timing, protects fabrics, optimizes detergent performance, and supports energy-efficient operation. when the thermistor functions correctly, the washer can maintain consistent temperatures and deliver predictable, safe cleaning results.
As a faulty thermistor can cause incorrect temperatures, error codes, or interrupted cycles, proper diagnosis is critically important to distinguish sensor failure from other electrical or control issues. When testing confirms thermistor malfunction, replacing it with the correct 134587700 part restores intended temperature control and helps avoid repeat problems. For reliable outcomes,follow manufacturer specifications and service guidance or consult a qualified technician to ensure safe,correct diagnosis and replacement.
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