Defrost Thermostat, Sensor
Genuine Ge part
By: Ge
Part Number: WR09X27221
This defrost thermostat monitors evaporator temperature and opens the circuit to the defrost heater at the correct point. It prevents overheating during the defrost cycle and helps restore proper airflow for consistent cooling.
- Senses evaporator coil temperature to control the defrost cycle
- Opens the heater circuit as the coil warms to terminate defrost
- Helps maintain airflow and stable compartment temperatures
- Failure signs: heavy frost/ice buildup, poor cooling, or defrost cycle not initiating/terminating properly
What's included: One defrost thermostat.
- Disconnect power before service; internal edges can be sharp—wear gloves
- Defrost and expose the evaporator to access the thermostat
- Reinstall in the original location/orientation on the evaporator tubing for firm thermal contact
- Route and secure wiring as originally; keep clear of moving parts and hot surfaces
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$172.28
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$206.74
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$34.46
Genuine Frigidaire part
By: Frigidaire
Part Number: 5304504239
This refrigerator temperature sensor detects fresh-food compartment temperature and provides the thermostat/control board with the readings needed for proper cooling management. Replacing a failed sensor restores accurate temperature feedback to the control system. What it does:
- Measures internal fresh-food compartment temperature for the control board
- Helps the fridge regulate run cycles to maintain set temperatures
- Faulty sensor can cause incorrect temperature display or inconsistent cooling
What's included: One temperature sensor for the fresh food compartment. Install notes:
- Always unplug the appliance before attempting any repair.
- Handle the sensing tip and wiring harness gently to avoid damage.
- Use basic hand tools; follow the wiring diagram for location and routing.
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$69.30
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$82.47
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$13.17
Genuine Frigidaire part
By: Frigidaire
Part Number: 5304518521
This thermostat controls refrigerator cooling by sensing temperature and signaling the compressor to cycle on and off, helping maintain steady food temperatures and restore proper cooling when the original control fails. What it does:
- Senses cabinet temperature and completes/disconnects the compressor circuit to regulate cooling
- Restores cycling when a failed thermostat causes warm temperatures or inconsistent cooling
- Works with the control panel and compressor to maintain set temperatures
- Common replacement when the fridge runs constantly, not enough, or cycles erratically
What's included: One thermostat Install notes:
- Disconnect power to the appliance before attempting any service
- Handle the sensing bulb/tube gently; avoid kinks or sharp bends
- Basic hand tools typically required; model-specific service instructions recommended
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$82.95
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$99.54
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$16.59
Genuine Frigidaire part
By: Frigidaire
Part Number: 5303918448
$56.95
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$67.20
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$10.25
Genuine Whirlpool part
By: Whirlpool
Part Number: W10205063
$88.95
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$105.85
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$16.90
Genuine Whirlpool part
By: Whirlpool
Part Number: W10287848
$80.95
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$97.14
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$16.19
Genuine Ge part
By: Ge
Part Number: WR50X10092
$121.95
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$145.12
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$23.17
Genuine Frigidaire part
By: Frigidaire
Part Number: 5304460356
$88.95
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$89.42
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$0.47
Genuine Frigidaire part
By: Frigidaire
Part Number: 5303918416
This thermistor kit is the refrigerator temperature sensor assembly that monitors internal air temperature so the control can run the compressor and fans at the right times. Replaces a failed sensor to restore proper temperature sensing and cycling. What it does:
- Detects refrigerator/freezer compartment temperature and sends that signal to the control board
- Helps the control manage compressor and fan runtime for consistent cooling
- Commonly used when the fridge is not maintaining temperature or cycles erratically
- Works as the sensor portion of the evaporator/air-sensing circuit in compatible models
What's included: One thermistor kit (sensor assembly as supplied by the manufacturer). Install notes:
- Disconnect power before servicing to avoid shock or damage.
- Handle the sensor and connector gently; do not kink the sensor lead or damage the probe tip.
- Route the harness and secure clips per the original layout to ensure accurate sensing.
Do-It-Yourself Stories from Customers like You
Oven not working clock would not turn on Mayra V. • Uvalde , TX • November 23, 2018
Chatted with a pro wich was very help in finding the problem
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$76.74
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$92.09
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$15.35
Out Of Stock
Usually ships within 4 - 14 days
Genuine Frigidaire part
By: Frigidaire
Part Number: 240386401
This defrost thermostat senses evaporator temperature and helps control the freezer's defrost cycle to protect components and maintain proper cooling. It replaces a faulty thermostat to restore reliable defrost operation. What it does:
- Opens or closes based on evaporator temperature to stop the defrost heater when the coil is warm
- Prevents overheating of the defrost heater by stopping current when defrost is complete
- Commonly replaces units that fail to allow timely defrosting or that keep the heater running continuously
- Helps resolve symptoms like persistent frost buildup, warm freezer temps, or frequent compressor cycling
What's included:
Install notes:
- Disconnect power to the appliance before accessing or replacing the thermostat
- Mount and connect the thermostat exactly as the original to ensure correct sensing and proper operation
- Inspect and secure wiring and heater connections; replace damaged clips or fasteners as needed
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$73.50
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$87.46
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$13.96
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Genuine Frigidaire part
By: Frigidaire
Part Number: 241983101
$191.95
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$228.42
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$36.47
Out Of Stock
Usually ships within 4 - 14 days
Genuine Frigidaire part
By: Frigidaire
Part Number: 5303917629
$5.94
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$6.80
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$0.86
Out Of Stock
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Genuine Frigidaire part
By: Frigidaire
Part Number: 5304436618
$84.95
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$101.94
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$16.99
Out Of Stock
Usually ships within 4 - 14 days
Genuine Mcf part
By: Mcf
Part Number: C0472.4.8
Do-It-Yourself Stories from Customers like You
Defrost thermostat Robby F. • Lafayette , IN • August 17, 2015
Replaced defrost thermostat.still testing it...but seems to work good
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$44.74
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$53.24
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$8.50
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Usually ships within 4 - 14 days
Genuine Whirlpool part
By: Whirlpool
Part Number: R0161085
This thermostat kit replaces a failed temperature control in compatible dryers to restore proper heating regulation and safe operation. It's a straightforward replacement for thermostats that have worn out or failed. What it does:
- Monitors and regulates dryer temperature to help maintain consistent heat
- Opens to stop heating when temperatures exceed safe limits to prevent overheating
- Commonly used when a dryer won't heat, overheats, or trips thermal cutouts
- Works as the temperature-sensing/control component in the dryer's heating circuit
What's included: One thermostat kit Install notes:
- Disconnect power to the appliance before starting any repair
- Access typically requires removing the dryer's back panel or control housing; follow OEM service instructions
- Handle terminals and wiring carefully; match wire locations exactly when installing replacement
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$73.27
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$86.46
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$13.19
Out Of Stock
Usually ships within 4 - 14 days
Genuine Ge part
By: Ge
Part Number: WR02X12808
$89.74
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$106.79
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$17.05
Out Of Stock
Usually ships within 4 - 14 days