134587700 Frigidaire â˘Washer Controlâ Thermistor is a⤠temperature-sensing âcomponent used in Frigidaire washing âmachines âthat âfunctions as a temperature-dependent resistor (thermistor). In practice this device providesâ theâ control âŁelectronics with a⢠voltage or resistance âsignalâ proportional toâ water or cabinet temperature;â many âappliance thermistors are negative temperature coefficient (NTC) devices, âthoughâ the precise characteristic should⣠be⤠verified in the service documentation for the specific âmodel.
Insideâ the appliance the⤠thermistor⢠interfaces directly⤠with the washer â˘control board and indirectly â˘with subsystems such as âthe heater,water inlet system and cycle logic.⤠The control board reads the thermistor’sâ signal to⢠determineâ water⢠temperature for âcycle selection âand heater control,to enforce temperature-related safety limits,and to make timing or valve decisions that affect âwash performance. proper placement (for âexample â¤mounted toâ the tubâ or near â˘the heater) and a reliable electrical connection are significant because inaccurate temperature⣠feedback can lead to incorrect heating, improper detergentâ action, fabric damage âor fault codes that⢠interruptâ operation.
In this article readersâ will find a âŁtechnical â˘overview âof the 134587700 thermistor’s function and expected electrical behaviour, guidance⢠on model compatibility and âhow âŁit is typically mounted and wired, common failure symptoms and diagnostic approaches,⣠and practical replacement âconsiderations.â Theâ coverage will include âhow to interpret resistance measurements relative to temperature, how the â¤sensor’s⣠faults present â¤in control diagnostics, âwiring and connector checks,⤠and â˘factors to consider when selecting and â¤installing a âreplacement to âŁrestore reliable temperature control.
Table of Contents
- Functional role of the⣠control thermistor âin Frigidaire washer temperature sensing and cycle regulation
- Howâ the 134587700 Frigidaire Washer Controlâ Thermistor interfaces⤠with the main controlâ boardâ and sensing âcircuitry
- Electrical and operational⤠failure symptoms: temperature errors, inconsistent cyclesand error codes
- Compatibility matrix and supportedâ Frigidaire washer models for part 134587700
- Replacement considerations, connector pinout, âŁand âstep-by-step installation procedure
- Diagnostic procedures âand multimeter resistance tests for âvalidating the control⢠thermistor
- Q&A
- Wrapping Up
Functional role ofâ the âcontrol â˘thermistor in âfrigidaire washer⣠temperature â˘sensing and cycle regulation
The 134587700 frigidaire Washer Control Thermistor ⢠is the temperature-sensing element used by theâ washer control â˘board to â˘monitor wash and rinse water temperature. It âis âan NTC (negative temperature coefficient) âthermistor whose resistance decreases in a predictable curve as temperature rises; the âŁcontrol samples that resistance and âconverts it to temperature to âmake decisions such asâ enabling the âŁheater, â¤selecting hot versus warm fillsandâ timing soak âor rinse steps. Correct operation â¤depends on matching the thermistor’s resistance-versus-temperature characteristic and mechanical âŁmounting to the specific washer model, because a sensor with âa different curve or poor thermal coupling â¤(air gaps, loose clips) willâ yield âŁinaccurate readings and âŁimproper â¤cycle âŁregulation.
Theâ control firmware continuously âreads the thermistor during a⣠cycle and⢠applies thresholds⢠to decide when to âenergize the heater âŁor progress to the âŁnext stage; this makes â˘the⢠thermistor central to both âtemperature control and certain fault detections. typical failure modes are open⤠circuit (infinite resistance), shorted/low resistanceor drifted âŁresistance that ânoâ longer corresponds⣠to actual temperature; each produces distinct symptoms such as no heat, â¤continuous heatingor erratic temperature-related cycle behavior. Technicians diagnose âthe part with a stable temperature source and a multimeter to compare â˘measured⢠resistance âagainst service data, verify secure electrical connection and thermal contactandâ replace⢠the unit only with âa compatible 134587700 part to ensure the original response curve and fit are preserved.
- Function: provides⣠a resistance signal proportional to waterâ temperature (NTC behavior).
- Symptoms of⣠failure: no heat, constant heat, incorrect cycle selectionor error codes relatedâ to temperature sensing.
- Installation: requires correct âŁconnector, secure mountingand â¤firm thermalâ contact to the tub or heater âŁassembly.
- Verification: measure resistance at a â˘known temperature and compare to service⢠specifications before replacement.
| Item | Description |
|---|---|
| Sensor⤠type | NTC thermistor, twoâwire⣠resistance sensor |
| Function | Provides the control board with a resistance-based temperature measurement used to â¤regulate heating and cycleâ decisions |
| Common failure modes | Open circuit,⣠shorted/low resistanceor resistance drift causing incorrect â¤temperature readings |
| Service check | Measure â¤resistance âat known âtemperature, confirm connector continuityand verify physical mounting/thermal contact |
How the 134587700 âfrigidaire Washer Control Thermistor interfaces with âŁthe âmain âcontrol âboard andâ sensing â˘circuitry
The 134587700 Frigidaire Washer Control⤠Thermistor is a temperature-sensitiveâ resistor mounted within the⤠washer’s⣠sensing harness that providesâ the main control board with real-time temperature feedback. It âis typically â¤implemented as an âNTC elementâ that âforms⣠a voltage dividerâ with⣠aâ pull-up or pull-down resistor on the⢠control board; the resulting analog⣠voltage is sampled by âŁthe board’s â¤ADC and translated into â˘a temperature value by âthe firmware. âŁAsâ temperature rises, the thermistor’s resistance â˘falls, producing a âpredictable change in the sensed âvoltageâ that the controller uses⢠to make decisions⢠about heater timing, water mixingand âcycle â˘selection. Because the control board expects aâ specific resistance-versus-temperature curve, the thermistor’s beta value âand connector pinout must match theâ controller’s⣠sensing circuit for accurate readings.
From⣠a service and⤠compatibility⤠perspective, the thermistor interfaces⣠passively with the board’s sensing circuitry and does not require activeâ drive signals beyond the board’sâ reference voltage. Technicians troubleshooting temperature issues can â¤verify the thermistor and âinterface by measuring resistance⤠at knownâ temperatures or âby probing⢠the harness voltage to confirm the expectedâ voltage divider behavior; discrepancies âŁbetween measured values and â¤the⣠service specifications indicate either a â¤degradedâ thermistor,wiring fault,or a failed input circuit on the âmain board. Replacement units must match theâ original part’s resistance âcurve andâ connectorâ style; otherwise the controller can â˘misinterpret temperature causing symptoms suchâ as â˘incorrect heating, extended cycle timesor specificâ sensor-related error codes.
- Common symptoms of thermistor/interface faults:⤠incorrectâ temperature readings, heater not⢠operating â˘when expected, error âŁcodes related to temperature sensors.
- Field tests: resistance check at ambient⣠temperature, in-situâ voltage check at the control harnessand inspection for connector⢠corrosion or broken wires.
- Compatibility⣠factors: matching âR(T) curve (beta value), physical placement, connector pinsand harness⣠wiring to âŁthe main control â¤board.
| Item | Description |
|---|---|
| Interface type | Passiveâ NTC resistor in âa voltage divider âŁfeeding the main boardâ ADC |
| Function | Provides temperature feedback for heating, fill logicand cycleâ control |
| Typical⤠tests | Multimeter resistance âŁat⢠known temps; probe âharness âvoltage to verify divider behavior |
| Failure indicators | Out-of-spec resistance, intermittent â¤open/short,⤠connector/wiring faults, incorrect⣠ADCâ voltage |
Electrical and â¤operational failureâ symptoms: temperature errors, âinconsistent cyclesand error⤠codes
The⣠134587700â Frigidaire Washer control Thermistor is a negative temperature coefficient (NTC) sensor that provides real-time water/tub temperature feedback to⢠the washer control⤠board.In operation it converts temperature into a variable resistanceâ thatâ the control⣠interprets to manage heater activation, select appropriate wash profilesand âtime certain cycle phases. When âthe thermistor’s resistance is⣠out of the âexpected range-due to an open circuit, short, â¤intermittent connectionor a â¤drifted element-the control will register temperature errors or throw model-specific error codes and âŁmay default to conservative behavior such as â˘disabling the â¤heater or â˘aborting the cycleâ to protect the machine and âfabrics.
- Visible symptoms:⣠temperature errorâ messages, heaters that neverâ engageor cycles that⢠repeat or terminate⣠prematurely.
- Behavioral issues: inconsistent âcycle lengths,⢠variable agitation or rinseâ temperatures caused âŁby fluctuating temperature âreadings.
- Diagnostic⢠clues: stable but out-of-spec resistanceâ vs. true temperature suggests a bad thermistor; intermittent âreadings often indicateâ wiring/connectors or a â¤failing sensor âelement.
| Item | Description |
|---|---|
| sensor âtype | NTC thermistor; provides resistance proportional to temperature for the control board âŁADC input. |
| Interface | Twoâ or threeâwire harness â˘to the main control; â¤must match connector andâ wiring polarityâ for â¤compatibility. |
| Failure âresponse | Control logs âa temperature fault, may display error code, inhibit heateror alter cycle timing. |
| Field check | Measure resistance across the sensor at a known temperature and compare to service manual values; inspect harness⢠and ground continuity. |
In âpractical troubleshooting, confirm whether the control board receives a steady, plausible resistance valueâ before âreplacingâ the thermistor: a⢠steady incorrect resistance pointsâ to âa defective sensor, âwhile erratic â¤orâ intermittent⤠values often implicate wiring, connector corrosionor poor⢠solder joints at âthe control. Replacing the â¤134587700 Frigidaire Washer Control Thermistor typically resolves temperatureâbased faults when diagnostic resistance checksâ fail;⣠though, â¤if â¤measured⢠values âare correct and faults persist, the control board’s input circuitry⢠or âfirmware diagnostic thresholds⤠shouldâ be⤠examined.For field service, ârecord the resistance at â¤several â˘known temperatures (cold and warm â˘water)⤠and document any âtransient errors during monitoring to distinguish sensor failures âfrom electronicâ control⣠issues.
Compatibility⣠matrix and â¤supported Frigidaire washer models for part 134587700
the 134587700 Frigidaire Washer Control Thermistor ⤠is the temperature-sensing⤠elementâ that provides the washer’s main control boardâ with a continuous analog â¤readingâ of tub âor water⢠temperature.It is an NTC (negative⤠temperature coefficient) thermistor: its electrical resistance decreases⣠asâ temperature âincreasesand the control interprets that âresistance to make decisions for heating,â sanitize cyclesand âtemperature-dependent timing or fill logic. The âthermistor itselfâ does not switch heaters or pumps; it simply reportsâ temperature, so correct electrical interface, lead lengthand mounting location are required âto ensure accurate âreadings and reliable cycle control.
compatibility is resolute by âŁthe sensor’s electricalâ characteristics and mechanical fit rather than a â˘single model â˘family; many Frigidaire washers⤠that accept a twoâwire NTC input âwill use âa âŁdirect replacement, but techniciansâ should verify⤠model-specific wiring â¤harness, connector shapeand mounting bracket before installing. Practical âŁchecks âinclude⣠a parts cross-reference against the washer model, measuring theâ thermistor’s resistance at âa known temperature â(room temperature reference often ânear 25°C)and confirming that the control board expects an NTC input. âTypical service actions for verifying compatibility âand function:
- Cross-check â¤the washer model and service manual or parts⤠list to confirm â134587700 is listed as the replacement part.
- Measure⤠resistance at ~25°C and compare â˘to the service specification (many â¤refrigerator/washer⤠thermistors â¤are around 10 kΊ at 25°C, verify against the âservice sheet).
- Verify⢠connector type, wire colors, âŁand âmounting location match the original⢠to avoid misreading due to sensor placement⣠or harness differences.
| Item | Description |
|---|---|
| Sensor type | NTC thermistor, two-wire âanalog inputâ to washer âcontrol |
| Typical âresistance | Frequently enough near 10 kΊ at 25°C;â consult model service â¤data for exact â¤spec |
| compatibility⤠notes | Compatible â˘withâ Frigidaire models that use a two-wireâ NTC input⣠and matchingâ connector/mounting; confirm via model ânumber cross-reference |
Replacement considerations, connector pinoutand step-by-step installation procedure
the 134587700 âŁFrigidaire Washer Control Thermistor is the temperature âsensing element that provides the⣠washer control board with a resistance-basedâ temperature signal used âto regulate cycles that depend on tub temperature.â It is an NTC-type device (resistanceâ falls as temperature rises) and âthe control board reads⣠that change through âŁa two-wire connector.⤠Failures present as open circuits,â intermittent connectionsor out-of-specâ resistance âcurves; symptoms include⤠incorrect cycle selection, âfailure of temperature-dependentâ optionsor âfault codesâ related to temperature sensing. Verify compatibility by â¤matching âthe electrical characteristics (resistance vs. temperature curve), connector pin spacing and housingand â˘mounting âmethod toâ the original part before replacing the thermistor.
- Toolsâ and preparations: âmultimeter, â˘small screwdriver set, photosâ of connector orientation,â service manual or model wiring diagram.
- Pre-checks: power disconnected, harness keyed orientation noted, measure resistance at room temperature and compare to documented⤠values.
- Installation checklist: unplug harness, â˘replace sensor âwith âcorrect orientation, secureâ connector andâ strain âŁrelief, âŁand run a⤠diagnostic or⣠calibration cycle after reassembly.
| Item | Description |
|---|---|
| Connector pinâ 1 | Thermistor lead A ⢠-⤠signal input to the control board ADC; expect⤠resistanceâ to change with temperature (NTC behavior). |
| Connector pin 2 | Thermistor lead B – reference/return; completes the⢠two-wire sensing circuitâ and provides âstable⤠reference⢠for board measurement. |
Follow a controlled installation sequence: remove power, âaccess the control assembly or harness route, document connector orientation, unplug the old thermistorand transfer â¤the â˘new sensor keeping wire polarity and connector keying⢠intact. After âŁmechanical installation, measure the new thermistor’s âcold âresistance⢠with a multimeter and compare against the appliance service data (many washers use â˘values in the kiloâohm range at ambient temperature, e.g., aroundâ 10 kΊ on⣠some designs, â˘but confirm forâ your model). â¤Reconnect⢠the harness, secureâ all clips to prevent chafing, restore power, â˘and run a diagnostic or a short test cycle⢠to confirm the control board reads the expected temperature changes⤠(observe live resistance or temperatureâ readings if the service mode providesâ them). âŁIf readings are erratic, recheck⣠pin⢠seating, wiring continuityand the control board connector for âcorrosion or âbent â˘pins.
Diagnostic âprocedures and âmultimeter âresistance tests⤠for â¤validating the control thermistor
The⣠134587700 Frigidaire Washer control Thermistor provides a resistive temperature signal â¤to the washer control board that the machine⢠uses to regulate⢠water temperature and cycle timing. As an âNTC-type sensor in âmost Frigidaireâ designs, its resistance falls as âŁtemperature⣠rises; the control measures that resistance to âŁdecide when toâ advance âŁor â¤hold a heating or fillâ sequence. â¤This âpart is an OEM designation for âspecified⢠Frigidaire models, so âverify model compatibility âbefore replacement – physical connector style and nominalâ resistance curve must match the originalâ sensor to ensure⤠correct⤠operation across all wash programs.
- Safety first: disconnect power and unplug the washer⢠before â˘accessing the thermistor connector.
- Remove the sensor harness to measure theâ thermistor in⢠isolation (avoid â¤in-circuit readings that â¤can⣠be skewed by⤠parallelâ components).
- Set the â¤multimeter to an appropriate resistanceâ range (ohms/kΊ) and record readings at âknown temperatures: ambient, ice waterand warm water.
- Look for aâ smooth, predictable change in resistance asâ temperature changes; erratic, openorâ near-short readings indicateâ a failed sensor.
To validate the thermistor⤠with aâ digital multimeter, measureâ across the sensor leads at room âtemperature with the harness â˘disconnected; then change the sensor âtemperatureâ and ânote the direction⤠of change.A functioning âNTC thermistor⤠will show a⣠measurable resistance at ambient that decreases when warmed and⢠increases when cooled. Typicalâ service practice is to compare those measurements toâ the washer’s service â˘data; if âthe âpart’sâ specifiedâ resistanceâ curve is ânot âavailable, use the following diagnostic criteria: a stable, repeatable change in resistance withâ temperature indicates a usable sensor, â˘an open (infinite) reading or very high megohm â˘values indicates an open elementand a near-zero orâ very low âresistance indicates an⣠internal short. â¤If â¤readings are marginal or âfluctuating, â¤replace the âthermistor⤠rather than relying on intermittent behavior in â˘the controlâ board.
| Item | Description |
|---|---|
| Stable kΊ reading that decreases with â˘heat | Normal behavior for an NTC thermistor â¤(pass); compare⤠curve to service data if âŁavailable |
| Open/infinite resistance | Sensor element is âopen – replace the thermistor |
| Very low â˘resistance (near 0 Ί) âorâ erratic readings | internal short â˘or intermittentâ fault – replace⤠theâ sensor |
Q&A
What is⢠the 134587700 Frigidaire Washer âControl Thermistor and what does it do?
The 134587700 thermistor is a temperature-sensing component used by the washer’s control electronics.The control board reads âthe thermistor to monitor temperature (for âwater⤠temperature sensing orâ to protect/control electronics, depending on the âmodel). The board uses that temperature information to select wash temperatures, run heaters correctly (if equipped)and âdetect fault⢠conditions causedâ by overheating or a failed temperature sensor.
What are the common âsymptoms of a âŁfailing 134587700 thermistor?
Common signs include incorrect or inconsistent water temperatureâ in âŁwash cycles,â cycles that⤠stall or abort when the machine expectsâ a temperature reading,⣠error or fault codes ârelated to⤠temperature sensingor the washer behaving unpredictablyâ (e.g., refusing to advance to the next â˘step). A completely open or â¤shorted⣠thermistor may âalsoâ prevent the⣠machine from heating⣠(if equipped) orâ cause⤠the control board to â˘trigger aâ fault.
How⢠can I⢠test⢠the 134587700 thermistor with a multimeter?
Withâ the washer unplugged and the⣠thermistor disconnected from âthe harness, set aâ digital âmultimeter toâ the resistance âŁ(ohms) range. Measure acrossâ the thermistor leads – you should â˘see âa âfinite resistance value.the â˘134587700 is âan⤠NTC (negative temperature coefficient) device, so its â˘resistance âwill decrease as temperature increases. to â¤confirm âoperation,measure resistance at â˘room temperature,then gently warm âthe sensor (warm water âŁor a hair dryer â¤at a â¤distance);⤠the resistance should drop. If the reading is open (infinite) orâ shows a short (near 0 Ί)â and does⢠not â¤changeâ with temperature, âthe thermistor isâ bad. For exact resistance vs. temperature⤠specifications, consult theâ model’s â¤service âsheet â¤or âFrigidaire part documentation.
Where is the thermistor located and how â˘challenging is it to replace?
Location âvaries by washer model. Theâ thermistor might potentially be mounted⢠on the control board, inside the consoleorâ in the âtub/water⢠path forâ direct water temperature sensing.Replacement âdifficulty ranges from easy to â¤moderate: most frequently enough âŁit involves removingâ the control console or back panel, unplugging the connectorand swapping theâ sensor. âYou should unplug power, take ESD precautions⤠when handling⣠the control boardand follow the â˘washer’s⢠service manual or âa â˘step-by-step â¤guide for your specific â˘model.
Is⣠the⢠134587700 thermistor compatible with my Frigidaire â¤washer model?
Compatibility depends on⤠the exact washer⤠model and production revisions. âAlways â¤verify compatibility by âmatching the part⢠number (134587700) â˘with the parts listâ for your specific model number or by checking with Frigidaire/ApplianceParts distributors.⣠Do not â˘rely solely on photos – compare⣠connectorâ type, âmountingand harness pins before purchasing or installing.
Will replacing the thermistor require any calibration or control board reprogramming?
Generallyâ noâ special⢠calibration or reprogramming⢠isâ required after replacing âthe âthermistor. once âinstalled, the⢠control board will read the new sensor automatically. However, some models may ârequire you to clear error âŁcodes orâ run⢠a diagnostic cycle to confirm proper operation; â¤consult the service manual for your model âŁto⣠see ifâ a diagnostic reset is recommended âafter replacement.
Can⢠I use an aftermarket thermistor instead âŁof the OEM 134587700?
Aftermarket âparts are â¤available and may work⣠ifâ they match the electrical characteristics, âŁconnector,⢠and mounting of the OEM part. To avoid issues, âchoose a replacement specified for your model orâ a reputable aftermarket part that explicitly lists compatibility. Using a thermistor with differentâ resistance characteristics canâ cause incorrect⣠temperature readings âand⤠improper machine operation.
What safety precautions should I take when replacingâ or testing the thermistor?
Always disconnect mains power before accessing internal components. Avoid âstatic discharge when handling the control board; use an anti-static wrist strap or touch a âŁgrounded⣠metal surface. do not short thermistor leads to other circuits. â˘If you aren’t cozy working with electrical âcomponents or if the⢠thermistor is mountedâ in a location that requires âextensive disassembly, consider havingâ a qualified appliance technician perform the âŁreplacement.
Wrapping⣠Up
theâ 134587700 Frigidaire washer control thermistor is a critical sensor that monitors water and internal component temperatures and communicates that information to the washer’sâ control board. By⤠providing accurate temperature readings,â the thermistor helps the machine maintain correct cycle performance, protect fabrics and internal componentsâ from overheatingand contribute to efficient energy and âwater use. When functioning properly, it supports⢠overall reliability and⣠consistent wash results.
Because temperature-sensing faults can mimic other electrical or mechanical problems, careful diagnosis is important before replacement. Testing the thermistor according to the manufacturer’s⣠service procedures-or engaging âŁa âqualifiedâ technician-ensures theâ root cause is identified and â¤prevents unneeded parts âchanges. When⤠replacement⣠is required, using the correct â134587700 part⢠and followingâ proper installation and calibration practices⣠restores intended operation, helps avoid further damageand maintains the appliance’s⢠safety âandâ efficiency.
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