134587700 Frigidaire Washer Control Thermistor âis a temperature-sensingâ component used in Frigidaire washing âmachines to provide the control electronics withâ real-time temperature feedback. It is indeed⤠a small, typically twoâterminalâ thermistorâ deviceâ (commonly an NTCâ – negative temperature â¤coefficientâ – type) mounted where âit â¤can sense tub or water temperatureâ and wired into the machine’s⣠main control harness.
Inside the appliance⤠the thermistor supplies âthe control board with an electrical value that varies with temperature; the âŁcontrolâ board interprets that value as water â˘or drum temperatureâ and⤠uses it to control heating elements,valve timing,cycle selection,and safety interlocks.The thermistor thus interacts directly â˘with the⣠electronic⢠control module and indirectly with components such asâ the heater assembly, âwater inlet/mixing⢠valves, âand⢠cycle logic. Proper placement,â sealingand âan expected resistanceâversusâtemperature â¤characteristic areâ important⢠for reliable temperature regulation and for achieving the intended fabric care⢠and â˘energy performance of a cycle.
Thisâ article will explain the thermistor’s functionâ and electrical behavior, identify the âŁsystems and models where partâ 134587700 is â˘typically usedand âdescribe common âfailure â˘symptomsâ such âas â¤incorrect temperature readings, heater nonâengagementor temperatureârelated⢠error⢠codes.⣠It will also cover practical troubleshooting steps⣠– including âŁresistance checks, âconnector and harness inspectionand comparison âŁto manufacturer specifications – âand âŁoutline replacement considerations⢠such as verifying part number andâ resistanceâtemperatureâ curve, connectorâ fit, â¤mounting and sealing requirements,⣠and safe powerâoff procedures.
Table of â¤Contents
- Functionalâ role andâ Electrical â˘Characteristics of the Washer Control Thermistor
- How the 134587700 âfrigidaireâ Washer Control Thermistor Interfaces with the Control Board and Temperatureâsensingâ Circuit
- common Failure Symptoms and Diagnostic Indicators of Thermistor Malfunction
- Compatibility,OEM âCrossâReferences and Replacement/Installation â˘Guidelines for âthe 134587700 Frigidaire Washer Control âThermistor
- Q&A
- Final Thoughts
Functional Role and Electrical Characteristics âof the Washer Control Thermistor
The â 134587700 Frigidaire washer Controlâ Thermistor is âan⣠NTC â(negative temperature coefficient) sensorâ thatâ provides the washer control board with a temperature-dependent resistance used⢠to â˘inferâ tub â¤and âŁwater temperature. It⢠is âindeed typicallyâ placed in the water path or âsecured to âŁthe â¤tubâ and â˘wired⤠into a âvoltage-divider/ADC input on the main control board; as temperature increases⢠the âthermistor resistance decreases,â producing a predictable⢠voltageâ changeâ the controller â˘interprets as temperature. This measured signal⣠is used to â˘manage heater operation, select appropriate cycle profiles, âadjust water mixingâ logic,⣠and support diagnostics-as â¤an example, the controller will discontinue heating once the sensed temperature âŁreaches the âprogrammed⤠setpoint⤠or will flag aâ heater/thermistor fault if resistance does notâ changeâ while heating is commanded.
Replacement⢠and⢠troubleshootingâ require attention toâ the thermistor’s resistance-versus-temperature characteristic (Beta value), connector typeand mechanical mounting:⢠using a physically compatible âpart with a⤠different resistance⤠curve can produce incorrect âtemperature âreadings and mis-timed cycles. âTechnicians validate the device electrically by measuring resistance at known temperatures or byâ observing expected resistance change when the heater âisâ energized,and⣠visually âinspect the connector and⣠harness⢠for corrosion or loose pins. Practical failure âsymptoms include prolonged or incompleteâ cycles, heater âŁstaying on or never reaching set âtemperatureand âtemperature-related error codes; confirmingâ the resistance curve and connector âmatch the âŁoriginal part ensures âŁproper compatibility and âreliable control behavior.
- Erratic temperature readings or no âresistance change when heater is on
- Washer fails to heat⤠or fails âŁto terminate heating
- Long or stuck cycles due toâ incorrect temperature feedback
- Visible âdamage, â˘corrosionor âloose âconnector at the âŁsensor
| Item | Description |
|---|---|
| Type | NTC thermistor; resistance decreases with increasing temperature |
| Electrical interface | Two-wire, typically read âvia voltage⤠divider into ADC âon⢠control board |
| Function | Provide⤠real-time temperature feedback for heater control, cycle â¤logicand diagnostics |
| Typical â¤test | Measure resistance âat ambient and after â¤warming; verify expected decrease and compare to manufacturer curve |
How⤠the 134587700 Frigidaire washer âControl Thermistor Interfaces with the âControl Board andâ TemperatureâSensing Circuit
134587700 frigidaireâ Washer⢠Control â˘Thermistor ⣠is âan NTC temperature sensor that interfacesâ directly with the washer control board’s temperatureâsensing circuit by forming a temperatureâdependent âŁleg of a voltage⢠divider. The⣠control board supplies aâ bias/reference â¤and measures the⣠resultingâ analog voltage;â firmware converts that voltage âto aâ temperature reading using the thermistor’s calibrated resistanceâtoâtemperatureâ curve or a⢠lookup table. In practise âŁtheâ thermistor letsâ the board âdecide whether to â¤apply the âheater, select hot or⤠coldâ water fill, â˘or adjust âcycle timing. The sensor â˘must â˘beâ sampled and filtered by the control electronics to âreject transient âŁnoise from motors, pump operationorâ water flow âŁso the temperature value â˘remains stable for control decisions.
- Voltage divider âŁinterface toâ theâ control⢠board’s⢠ADC
- Provides feedback for⣠heater control andâ wash⣠temperature selection
- Monitored for open/short faults and outâofârange values by diagnostic logic
- Physical mounting and thermal contact affect measured temperature
Compatibility is determined by matching the â¤thermistor’s resistanceâvsâtemperature⤠specification, âconnector and wiring,â and the mechanical âmounting that places the sensor where the control board âŁexpects it. Replacements that do not match theâ curveâ or tolerance will produce systematic temperatureâ errors and can cause improper⤠heater cycling⢠or âŁerroneous â¤fault codes. Technicians verifyâ operation by measuring resistance⤠across the thermistor leads while changing its⤠temperature (such as, room temperature and a warm water bath) to âconfirm resistance falls with âincreasing⢠temperature and roughly follows the expected curve; the control board can⤠also be observed⤠for expected voltage changes or diagnostic codes when the sensor is manipulated. Proper replacement and correct âseating of the sensor ensure accurate temperature⢠controlâ and reliable interaction âwith the washer’s⣠controlâ logic.
| Item | Description |
|---|---|
| Sensor type | NTC thermistor used âas⤠a temperatureâdependent⢠resistor |
| Electrical interface | Forms a divider to an ADC or comparator âinput on âthe control board |
| Common fault symptoms | Open/short faults,â incorrect temperature readings, heater cycling âŁissues |
Common Failure Symptoms and Diagnostic Indicators⣠of Thermistor âMalfunction
The 134587700 Frigidaire Washer control âThermistor âis a temperature-sensing component used by the washer’s electronic control to monitor water or tubâ temperature and provide âa voltage/resistanceâ feedback signal. This thermistor is â¤an NTC-type⢠sensor, so its resistance falls as temperature rises; the control âboard⤠interprets that â˘changing resistance to time heating cycles, adjust soak and wash profilesand trigger fault logic if readings fall âoutside expected ranges. âCompatibility depends âŁon⤠matching the thermistor’s resistanceâ curve, connectorâ styleand mechanical mounting to the washer’s control harness-substituting a part with a different characteristicâ can âproduceâ incorrect temperature readings even if the connector fits physically.
- Visible symptoms: long âor âfailed heat cycles,wash⣠cycles thatâ endâ prematurely or⣠overrun,and temperature-related fault âŁflags⢠from the control.
- Electrical âindicators: open circuit (infinite resistance),near-short (very low resistance),or resistance âvalues that do not change predictably with applied heat orâ cold.
- Intermittent faults: resistance that fluctuates when the harness is moved, indicatingâ broken conductors, corrosion at the connectoror a failing sensor element.
- System-level indicators: control board reports inconsistent temperature inputs while other components (heater, valves)⣠test normal, â˘suggesting⣠the⤠sensor or its wiring as the⤠root cause.
| Item | Description |
|---|---|
| Openâ circuit | No continuity; control will usually âflag â˘a⢠sensor âfault and disable temperature-dependent â¤functions. |
| Short/low âŁresistance | Resistance nearâ zero; control reads high temperature âor invalid inputâ and may skip heating orâ throw errors. |
| NTC behavior | Resistance should decrease as temperature increases; lack âŁofâ change under âŁwarm/cool⤠testing indicates internal failure. |
For practical diagnosis, measure the thermistor âŁwith a multimeter at ambientâ temperature âand then applyâ aâ controlled heat source (warmâ water is â¤sufficient) while observing resistance: a working âsensor⤠will show a consistent, monotonic decrease âin resistance with⤠rising temperature. Back-probingâ theâ connector during a cycle can reveal whether theâ control board sees⣠a steady, plausible signal; persistent out-of-range readings with a verified⤠good harness point â˘to replacing⤠the⣠thermistor. Before â˘replacement,â verify connector pins and âŁharness continuity and â¤compare⢠measured values to theâ OEM specification curve for⤠the part-replacing the 134587700 âFrigidaire Washer⢠control âŁthermistor with a⤠unit that matches the original resistance profile and connector type prevents compatibility-inducedâ faults.
Compatibility, OEM CrossâReferences and Replacement/Installation Guidelines â¤for âthe 134587700 Frigidaireâ Washer Controlâ Thermistor
The 134587700 Frigidaire Washer Control Thermistor is the temperature-sensing element⢠that feeds the washer control board with a â˘resistive signal used⢠toâ determine âwater andâ tub temperatures.â It is typicallyâ a NTC device, meaning itsâ resistance fallsâ as temperature rises; the control board measures thatâ change-usually in a voltage-divider configuration-to â¤make decisions â˘for âheating, dwell timesand cycle â¤transitions.⣠Compatibility depends âon matching âthe⤠thermistor’s resistance-versus-temperature curve, mechanical mountingand connector pinout to the original part; â¤technicians often confirm suitability⣠by comparing the measured â˘room-temperature resistance to the OEM curve and â¤verifying the replacement uses the same harness â˘style and mounting âclipâ to ensure accurate readings and reliableâ environmental sealing.
Replacement and installation ârequire basic electrical⣠and âŁmechanical checks to â˘avoid control âerrors or false temperature readings. Before⣠final assembly, verify continuity and â˘the âexpected â¤cold âand warm resistance values with a multimeter, secure the sensor⣠so it contacts the tub â˘or sensing boss as originally designedand route the wiring⤠away from moving parts and heat⢠sources; after â˘reinstallation ârun a diagnostic or a monitoring cycle⢠to confirm the control board receives a âŁstable temperature signal. Practical checklist for aâ safe replacement is below.
- Disconnect mains and document âwiring âbefore removal.
- Confirm â˘replacement matches the âOEM resistance vs.temperature curve and connector type.
- Inspect⣠and replace any damaged seals or clips at â¤the âmounting point.
- Measure resistance at ambient and after gentle heating toâ confirm NTC behavior.
- Run a diagnostic â¤cycle and check control board â˘temperature âreadings before âfull reassembly.
| Item | Description |
|---|---|
| Type | NTC thermistor;⣠resistance â¤decreases with increasingâ temperature |
| Typical mounting | Snap orâ screw-mounted to the tubâ or a sensing boss; must contact the sensing surface |
| Test method | Measure⣠DC âresistance atâ ambient and after controlled heating; compare to OEM curve |
Q&A
What is the 134587700 Frigidaire washer control âthermistor and⣠what does it do?
Theâ 134587700 thermistor is a temperature sensor used by Frigidaire washingâ machines âto monitor water or tub temperature. The washer’s⢠control board reads the â˘thermistor’s âŁresistance to determine âtemperature and uses that details to control â˘fill temperature, wash cyclingand certain safety features.
How can I tell âŁif the â˘thermistor is failing?
Common symptoms of a failing thermistor â¤include incorrect water âtemperature âduring cycles, long or stalled cycles, intermittent â˘error codes related to temperature or sensingor a washer that won’t âadvance properly. visual signs can include a cracked âhousing, corrodedâ connector,â or damaged wiring. As other components can cause similar symptoms, test the thermistor electrically before replacingâ it.
How do⣠I test the thermistor â¤with⢠a multimeter?
Disconnect⤠power and unplug the washer. Locate and disconnect the thermistor from its wiring âharness.Using a digital multimeter set to measure resistance (ohms), measureâ across the thermistor leads. Then change the temperature âof âthe âŁsensor (warm itâ gently â˘with a âhair dryerâ or cool with ice water)⤠and âobserve the resistance: most â˘washer thermistors are NTC (negative temperature âcoefficient), so resistance should âdecrease as⢠temperature rises. If resistance is open (infinite), fixedor does â˘not change with âŁtemperature, â¤the thermistor is â˘highly likely bad.
Where is âŁthe thermistor located âin â˘the â¤washer?
Location varies⣠by model. On some âFrigidaire washers itâ is mounted on the tub or âat âthe base âof the âbasket; on others âit may be on or near the main control board. Consult your model’sâ service manual â˘or wiring diagramâ to find âthe âexact location. If â¤you’re unsure,remove the⤠lower access panel and trace the wiring from âthe control board to the sensor.
Is theâ 134587700⢠thermistor a âŁdirect âŁreplacement for â¤my Frigidaire washer?
Part 134587700 âis listed for specific Frigidaire models. To ensure compatibility, confirm âŁthe part ânumber â¤against⤠your â¤washer’s model and serial number or check the parts list in the service⣠manual. If you order from a parts supplier, provide your full model number so they can âverify it’s âthe âcorrect replacement.
How tough is it to replace the thermistor and whatâ safety steps âshould I take?
Replacement difficulty is generally moderate and typicallyâ involves removing an access panel orâ top, disconnecting the harnessand replacing the âsensorâ with âits mounting⣠clip. always disconnect the washer from power andâ shut⣠off the water supply before starting. Take âcare not â¤to⣠damage the wiring harness or connectors. If you’re not comfortable with electrical or mechanical repairs, hire a qualified appliance technician.
Couldâ aâ bad thermistor cause error codes or other⤠electrical problems?
Yes. A faulty thermistor can causeâ the control board â¤to receive incorrect temperature readings, which may âtrigger âdiagnosticâ error codes or cause the washerâ to behaveâ erratically (e.g.,⣠incorrect cycle selection,â failure âto advanceor⣠extended soak/fill âŁtimes). However, similar symptoms can also be caused by wiring faults, âconnector corrosionor a â¤failing⢠control board,⢠so confirm the thermistor’s condition before replacing the control electronics.
Any tips toâ troubleshoot â˘before buying⣠a replacement?
First,â visually inspect the sensor,⢠connectorand wiringâ for damage orâ corrosion. â¤Measure the thermistor’s resistance and verify⣠it changes â˘with â¤temperature. Check for âŁconsistent voltage/signals at⣠the harness with the control connected (only âif you are âŁexperienced and comfortable⢠working âlive). alsoâ clear â¤any stored â˘error codes âand run a diagnostic to see if the same code returns.If the sensor tests good âbut⢠problems persist, investigate wiring continuity and the control board.
Final Thoughts
The 134587700 Frigidaire Washerâ Control Thermistor plays âŁa critical role in the machine’s temperature âmonitoring and⣠control â˘system. By providing accurateâ temperature⣠feedback to the washer’s control board, it helps regulate⤠wash and ârinse cycles, protect sensitive components from overheating, â˘and maintain consistent performance and energy âŁefficiency. Proper â¤functioning of this thermistor contributes directly â¤toâ wash quality and the long-term⣠reliability of the appliance.
Because symptoms⣠of⤠aâ failing thermistor can mimic otherâ electrical or mechanical issues, âcareful diagnosis is important â˘before replacing parts.â Confirming the⣠thermistor’s readings with appropriate testing and ensuring the correct 134587700 replacement part is used will reduce â¤unneeded repairs and restore proper⤠operation.â When in doubt, rely on â¤qualified âservice personnel to diagnose and install the âŁpart to â¤maintain safety,⣠performanceand warranty considerations.
Professional Appliance Service
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