WR50X10068 GE Refrigerator Defrost Thermostat is a temperature-actuated switch designed for use in GEā¤ frost-free refrigerators and freezers.It is a defrost thermostat (a temperature-controlled safety device) that ā¢monitors evaporator temperature and opens or closesā a circuit in response to the āsensed temperature, typically mountedā in contact with the evaporator coil or return tube. ā¢As a discrete electromechanical ā¢component it is indeedā specified by its temperature trip point, switching mechanism andā current/voltage ratings āand is intended to be installedā in theā defrost circuit of the appliance.
Inside the ā¢appliance, the defrostā thermostat interfaces directly with the defrost heater and the defrost control (timer or electronic control board). When the evaporator temperature is below the thermostat’s trip threshold it completesā the heaterā¢ circuit to allow the defrost cycle to run; āonceā£ the evaporator warms to āthe hold-open temperature theā£ thermostat opens toā£ interrupt power to the heater, protecting the heater and surrounding components from overheating. In normal operationā¢ it worksā with the ā¢evaporator, defrost heater, thermostatā¢ sensorā¢ location and the control module to ensure iceā¤ accumulation is removed without damaging the evaporator āor wiring.
In this article readers will ā¤find a technical overview ā¤of the WR50X10068’s function and electrical characteristics, guidance on compatibility and proper mounting locations, commonā failure symptoms to recognize (such as persistent frosting, lackā¢ of defrostor a heater that does not āturn off),ā¤ basic troubleshooting steps including continuity and temperature-based checksand practical ā¢replacement considerations such as terminal connections, temperature ā¤ratingsand precautionsā£ to take when servicing the ādefrost ā¢circuit. The information is intended āto help technicians, engineers and appliance owners diagnose defrost-related faults and determine whether the thermostatā is the appropriate item to test or replace.
Table of Contents
- Function āand Role of the Defrost Thermostat in Refrigerator Frost Control
- How the WR50X10068 GE Refrigerator Defrost Thermostat Operatesā£ within the Appliance Defrost System
- common ā£Failure Symptoms and Diagnostic Indicators of a Faulty Defrost āThermostat
- Troubleshooting Procedures and ā¢Diagnostic Tests forā the WR50X10068 defrostā Thermostat
- Q&A
- Final Thoughts
Function and Role ā£of the Defrost Thermostat ā£in Refrigerator frost Control
Theā¢ WR50X10068 GE Refrigerator Defrost Thermostatā senses āevaporator temperature and interrupts the defrost heater circuit toā¢ prevent excessive heat ā¤on the coil and surrounding components. Mounted directly to or near the evaporator, ā¤this thermostat is typically a normally-closed temperatureā switch that āopens once the coil ā£warms above its trip point, stopping the defrostā£ cycle. In normal ā£operation āthe control boardā£ energizes the defrost heater for a timed intervaland the thermostat opens as ā¢the ice melts andā£ the coil temperature rises; if the thermostat fails closed the heater may run longer then intended, while a failed-open thermostat will prevent the heaterā from operating āat all.
Technicians āevaluate compatibility and behaviorā¢ by confirmingā the thermostat’s contactā¢ state at low and elevated temperatures and observingā system symptoms.ā Practical ā£diagnosticsā£ include checking continuity with a multimeter at cold (closed) and warm (open) conditions,ā£ and inspecting for persistent frost, flooded evaporator,ā or heater burnout ā¤as common āindicators of a faulty unit. Replacement considerations include matching theā tripā£ temperature and mounting style toā the original part to ensure properā defrostā¢ timingā¤ and reliable operationā¤ across GE refrigerator ā¤models ā£that use ā¢this thermostat.
- Function: ā£ Opens to terminate defrost heatā£ when coil āwarms.
- Normal contact state: Closed at low temperatures,ā£ open above trip temperature.
- Failure symptoms: Excessive frost build-up, continuous defrost heater operationor noā£ defrost activity.
- Test tip: āMultimeterā£ continuity cold = closed; warm = open.
| Item | Description |
|---|---|
| Model | WR50X10068 GE Refrigerator Defrost ā¤Thermostat |
| Function | Temperature-actuated switch that ācontrols defrost heater circuit |
| Contact state | Normally closed at lowā temps; opens ā¤at specified trip temperature |
| Typicalā tripā temperature | Approximately 30-50Ā°F (-1 to 10Ā°C), model dependent |
| Location | Mounted to evaporator coil or nearby conduit in defrost circuit |
How the WR50X10068 GE Refrigerator Defrost āThermostat Operatesā Withinā¤ the Appliance defrost System
The WR50X10068 GE Refrigerator Defrost Thermostat is a temperatureāsensitive switch mounted to āthe evaporator ācoil thatā¢ provides the control input for theā defrost heater circuit. During a defrost ā£event initiated by a timer orā£ electronic control board, the thermostat monitors coil temperature and changes contact state at a defined trip point āso the heater only runs longā enough to ā£melt accumulated frost.ā¢ In most installations the device ā£is a bimetal-typeā£ thermostat that āis normally closed at cold evaporator temperatures (allowing ācurrent to flow when the control calls for defrost) and opens once the coil reaches the thermostat’s set temperature to terminate heater ā¤power, preventing unnecessary heat submission toā the refrigerant circuit and reducingā¤ compressor recovery time once defrost ends.
- Typicalā symptoms of failure: persistent ice buildupā¤ (thermostatā£ stuck open), continuous ā£heaterā¢ operation ā¢or nuisance defrosts ā(stuck closed)or intermittent defrost cycles.
- Installation notes: the thermostatā¢ mustā¢ be firmly clamped ā¤to theā evaporator tube or coil and theā electrical terminals matched to the control harness for reliable sensing andā switching.
- Testing: continuity check at cold temperatures and observing ā¤open/close behavior when the sensor is warmed can confirm functionality.
| Item | Description |
|---|---|
| Function | Senses āevaporator temperature and ā¢interrupts defrost heater circuit at set point |
| Contact āaction | Normally closed when cold; opens āat rise to trip temperature |
| Typical tripā range | Approximatelyā¢ 32-45Ā°F (0-7Ā°C), model and calibrationā dependent |
| Location | Clamped to evaporator coilā¤ or tubeā¢ near the frost accumulation area |
| Service check | Continuity at cold; opens when gently heated with controlled ā¤source ā£(e.g., hair dryer) |
In practice, the WR50X10068 functions as a safety and efficiencyā device within the defrost system: it prevents the heater from running afterā¢ the iceā¤ has melted and prevents prolonged heating that canā¤ stress seals and components.ā£ Whenā replacing or troubleshooting this thermostat, match āthe mounting style, electrical terminal typeand thermal trip range to the original component; mismatched specifications can cause premature cycling, incomplete defrostor excessive compressor runāin after defrost. For fieldā diagnosis, combine a continuity test with observation of theā defrostā¢ cycle ā£(or simulateā defrost with a service mode) to ā£isolate whether the thermostat, the control board/timeror ā£the heater element is the cause of defrost malfunction.
Commonā¤ Failure Symptoms and Diagnostic Indicators of a Faulty Defrostā Thermostat
WR50X10068 GE Refrigerator Defrostā¢ Thermostat is aā temperatureāsensitive switch used in GE defrost systems to monitor evaporator temperature and control theā defrostā¤ heater circuit.It is typicallyā¢ a bimetal or sealed thermostat mounted in contact ā¢withā¢ theā£ evaporator or its sensor well and functions as āa safety and ā¢control element: it completes or interruptsā the heater circuit depending onā evaporatorā£ temperature so ātheā heater only runs during a timed defrost and āstops once ā¢theā frost has melted. The part is compatibleā£ withā many GE upright and sideābyāside models āand interacts directly with the defrost timer/board and the defrost heater, ā¤so its electrical ābehavior (open vs.closed) under specific temperatures ā¢determinesā whetherā¢ the heater can energizeā¤ during a ādefrostā cycle.
- Heavy orā£ persistent ice onā¢ the evaporator with normal ā¢compressorā operation – indicates the thermostat may be openā when it should be closed (preventing heater operation).
- Noā voltage at the defrost āheater terminals during ā¤an active defrost cycle ā- suggests an open āthermostat or a failed control in series with the thermostat.
- Continuously warm freezerā¤ or water pooling – can result from a thermostat thatā is stuck closed or shorted, allowing excessive heater operation or disabling normal refrigeration timing.
- Intermittent defrosting or inconsistent frost patterns – ā£points to an intermittently failing thermostatā that changes state unpredictably with temperatureā cycling.
Technically useful diagnostic actionsā include verifying continuity and āstate change of the thermostat with a multimeter whileā¤ changing its temperature (for example, cooling it with ice to confirmā it closes, then warming ā¢to confirm it opens),ā£ and measuring āfor line voltage at the defrost heaterā¤ during anā¢ initiated defrost cycle to isolate whether the fault is in the thermostat or the control board. A thermostat that shows continuity when warmā¤ (fails to open) or ā¢remains open when cold (fails to ā¢close) should ā¢beā replaced; because the WR50X10068 is a simple thermal switch, replacement is a straightforward remedy ā¢when ā¢electrical tests indicate outāofāspec behavior rather thanā¢ wiring or board faults.
| Item | Description |
|---|---|
| normalā¢ behavior | closes at lowā£ evaporator temperaturesā¢ to allow defrost operation, opens asā evaporator ā¢warms to ā¤terminate heater. |
| Diagnostic indicator | Continuity present when cooled (closed),ā£ continuity absentā¤ when warm (open);ā lack of this change indicates failure. |
Troubleshootingā¤ Proceduresā and Diagnostic Tests forā the WR50X10068 Defrost Thermostat
WR50X10068 GE Refrigerator Defrost thermostat is a temperature-actuated switch used in the defrost circuit to monitor evaporator coil temperature and permit the defrost heater to energize when theā coil is below its trip threshold. Functionally it behaves as a normally-closed contact at low temperatures and opens āas theā evaporator warms; āthis prevents ā¤the heater from running continuously and limits defrost duration. Compatibility depends onā terminal type,mounting clip,andā£ theā¤ thermostat’s trip range ā¤- ā£theā¢ WR50X10068 fits many GEā¤ models that use a two-terminal,clip-on style thermostat,but āreplacement ā£must match the original part’s electrical rating āand physical ā¤attachment toā the coil ā£toā¢ ensure correct operation and reliable sensing of āthe evaporator temperature.
Troubleshooting āuses basic continuity and live-circuit checks to isolate a failed thermostat from āheater, control board,ā¤ or sensing issues. With powerā¤ removed, a multimeter should show near-zero ohms ābetween ā¤the two terminalsā¤ when the thermostat is cold and open/infinite resistance when warmed; to confirm behavior, place the ā¢thermostat inā an ice-water ā¤slurry to āsimulate an icy evaporator and recheck continuity.Ifā¤ the thermostatā£ passesā£ bench tests but theā¢ heater still does not energize during a defrostā cycle, verify control-boardā¢ outputs andā£ wiring harness voltage during a commanded defrost; if the board supplies voltage to theā defrost heater but āthe thermostat is open under cold conditions āor shows intermittent contact,ā replace the thermostat.
- Symptoms to check:ā persistent frost on coils,ā¤ compressor short-cyclingor heater not energizing during ā¢defrost.
- Basic steps: remove power, disconnect the thermostat, measure continuity cold andā warm, simulate coldā in ice water, then test heater voltage during a ācommanded defrost with power on.
- Safety: always remove line power before handling ā¢terminals and use insulated toolsā when probing live circuits.
| Item | Description |
|---|---|
| Type | Temperature-actuated, two-terminal defrost thermostat (normally-closed when cold) |
| operation | Closes āat low evaporator temperatures toā£ permitā heater current; āopens as coil temperature ā£rises |
| Expected continuity | Closed (ā0 Ī©) whenā cold; open (infinite) when warm |
| Typical mounting | Clip-on or strap-on to evaporator coil; two swift-disconnect terminals |
Q&A
What is the WR50X10068 defrost thermostat and what does it ā£do?
The ā£WR50X10068ā£ isā¢ a GE OEM defrost thermostat (a bimetallic ātemperature switch) used on many frostāfree refrigerators. It is indeed wired in series with the defrost āheater and closes (conducts) whenā¤ the evaporator is ā£cold so the heater can run during a ā£defrost cycle,thenā¢ opens when ā¤the evaporator warms up ā¤to stop the heater once frost/iceā¢ is melted.
Where is the WR50X10068 located in theā¢ refrigerator?
It is mounted on or clipped to the evaporator ā¢coil or evaporator cover inside the freezer compartment.Youā typicallyā£ access it by removing the freezer back panelā¤ or evaporator cover. The part looks like a smallā£ metal sensor/bulb āor probe with two wire terminals and a clip.
What are common symptomsā¤ of a failing defrostā¢ thermostat?
Typical symptoms include ā£excessive ice buildāup on the evaporator, poor cooling in the fridgeā¤ or freezer, a constantly running compressoror water leaking under the fridge ā¢afterā a defrost cycle. If the āthermostat fails open, the defrost heater will ā¢not run; if it fails closed (less common) the heater could run too long and cause ā£other failures.
How do I test the WR50X10068 with a multimeter?
Always unplug the refrigerator before testing. Remove the thermostat fromā the evaporator and disconnect its wires. ā¤Set a multimeter to continuity or ālowest ohms range. At cold temperatureā¤ (place the āthermostat in a ā¢cup of āice waterā or put itā in theā freezer) the switch should be closed – you should see continuity orā£ near ā0 Ī©. Warm the sensorā (use yourā hand, a āhair ā¤dryer ā¢brieflyor place it at roomā temperature) and it should open (no ācontinuity/infinite resistance) once it reaches its cutāout temperature. If it does not change state,ā¢ the thermostat is defective. Note: the exact open/close temperatures vary by model; manufacturers’ specs give the setpoints.
How do I replace āthe WR50X10068?
Unplug the refrigerator. Remove the freezer back/evaporator cover ā¤to access the thermostat.ā Disconnect the ātwo wires, remove the clip orā¤ fastener holdingā¤ the probe to the coiland install āthe ānew thermostat in the same location and orientation. Reconnect the wires (matching the terminals), ā¢secure ā¤the probe to the coil with the clip, reassemble the coverand restore āpower. Avoid bending āor damaging the probe ā£and be careful of sharp evaporator fins. Ifā¤ you’re not comfortable, āhire a service technician.
Is WR50X10068 compatible āwith ā£my GE refrigerator model?
WR50X10068 is an OEM part usedā£ on ā£many GE and GEābrandedā£ refrigerators, but compatibility depends on ā£theā exact model.Check the refrigerator model ā£number and useā¤ GE’s parts lookup,ā¢ the owner’s āmanualor an authorized parts dealer to confirm compatibility. Doā£ notā rely only on physicalā appearance; confirm the part number matchā or approved ācrossāreference.
How is the defrost thermostat different ā¢from a ā£thermistor, defrost heateror defrost control?
The defrost thermostat isā¢ a simple ā¤bimetal switch that opens/closes at a set ā¢temperature and is directly inā series with ā¤the āheater. A thermistor is a resistance temperature sensor that reports temperature to an electronicā¢ control board (used on electronically controlled models). Theā defrost heater is the element that melts ice; the defrost control (timer ā¢or electronic board) initiates defrost cycles. ā¤All must work together for proper defrosting.
Can I bypass the defrost thermostat as a temporary fixand how much does the WR50X10068 cost?
Bypassing the defrostā thermostat āis notā recommended.ā¢ If you short it out to force the heater always on, you risk overheating the evaporator, damaging components, tripping safety devicesor creating a fire hazard. If youā bypass to forceā¢ it off, the heater will never run and iceā¤ will accumulate. The WR50X10068 ā£is a relativelyā¢ inexpensive OEMā part;ā typical retail prices range roughly $10-$30 depending on supplier. āFor āa safe repair, replace ā¢the āfaulty thermostat with the correctā¢ part number.
Final Thoughts
The WR50X10068 GE ā¢refrigeratorā£ defrost thermostat plays a central roleā¢ in maintaining proper ā£refrigerator operation ā£by sensing evaporator temperature and controlling the defrost cycle.By activating the heater at the appropriate time and preventing excessive frost buildup, the defrostā¢ thermostat helps preserve coolingā efficiency,ā£ maintain steady temperaturesā for safe food storageand reduce strain on the refrigeration system.
accurate diagnosis andā timely ā¤replacement of a āfaulty WR50X10068 are vitalā toā avoid recurring frost issues, higher energy useand potential component damage. Proper diagnosis-using the manufacturer’s specifications and appropriate ātesting methods-ensures that the thermostat is the true source of the problem before replacement. When replacement is necessary, selecting āa compatible part and followingā¤ safe installation practices help restore normal operation and ā¤avoid unintended complications.
understandingā¢ the function of the defrost thermostat āand addressing failures promptly supports refrigerator reliabilityā and āefficiency. Where uncertainty exists,relying āon qualified service professionals and genuine replacement āparts provides the best assurance of a correct repair andā¤ longer appliance service life.
Professional Appliance Service
If your appliance requires professional diagnosis or repair, visit
Revolff Home Services
for expert appliance repair services.
For local appliance service information see
Dryer repair Henderson
.
Replacement parts for many appliance models can also be found at
Reliable-Parts-Hub
.
