5303918599 Frigidaire Refrigerator Defrost Thermostat Kit – OEM Replacement for Frost Buildup & Cooling Issues
5303918599 Frigidaire Refrigerator Defrost Thermostat Kit – OEM Replacement for Frost Buildup & Cooling Issues
5303918599 Frigidaire Refrigerator Defrost Thermostat Kit – Fix Your Refrigerator with Frost Buildup, Freezer Icing Over, Poor Cooling
The essential fix for a Frigidaire refrigerator or freezer with excessive frost buildup in the freezer, ice accumulating on the evaporator coils, poor cooling performance, freezer icing over completely, or a refrigerator that's not cold enough because the defrost system isn't working properly.
The defrost thermostat is a temperature-sensitive switch mounted on the evaporator coils that controls when the defrost heater turns on and off. During normal operation, frost naturally builds up on the evaporator coils as the refrigerator runs. The defrost system periodically melts this frost to prevent ice buildup. When the defrost thermostat fails — typically stuck open or stuck closed — the defrost cycle doesn't work correctly. A stuck-open thermostat prevents the defrost heater from turning on, causing frost and ice to accumulate until it blocks airflow and reduces cooling. A stuck-closed thermostat can cause the defrost heater to run too long, potentially damaging components.
✓ Common Symptoms Fixed
- Excessive frost buildup in the freezer compartment
- Freezer icing over completely and blocking vents
- Ice accumulating on the evaporator coils
- Refrigerator not cooling properly or not cold enough
- Freezer works but refrigerator is warm
- Frost buildup returns quickly after manual defrost
- Reduced airflow from freezer to refrigerator section
- Defrost heater never turns on during defrost cycle
✓ Key Features & Specifications
- Part Number: 5303918599
- Type: Defrost thermostat kit (includes thermostat and mounting hardware)
- Genuine OEM: Factory Frigidaire/Electrolux part for guaranteed fit
- Function: Controls defrost heater operation based on evaporator temperature
- Location: Mounted on the evaporator coils inside the freezer compartment
- Kit Includes: Defrost thermostat and mounting clips/hardware
- HS Code: 841869
- Weight: 5 lbs (shipping weight)
✓ Buying Options
New OEM: Genuine factory Frigidaire part with full warranty coverage. Guaranteed exact fit and performance identical to the original thermostat installed at the factory. Best choice for critical cooling system components where reliability matters.
✓ Installation Tips
Difficulty: Moderate – requires accessing the evaporator coils inside the freezer
Time Required: 45–60 minutes (plus defrost time if needed)
Tools Needed: Phillips screwdriver, flathead screwdriver, putty knife, towels (for water from melting ice)
Steps:
- Unplug the refrigerator from the wall outlet
- Remove all food from the freezer and allow ice to melt (or use a hair dryer on low heat)
- Remove the freezer shelves and bins
- Remove the screws securing the evaporator cover panel inside the freezer
- Carefully remove the cover panel to expose the evaporator coils
- Locate the old defrost thermostat clipped to the evaporator coils
- Disconnect the wire harness from the old thermostat
- Remove the mounting clip and pull off the old thermostat
- Install the new thermostat in the same position using the new mounting clip
- Reconnect the wire harness to the new thermostat
- Reinstall the evaporator cover panel and secure with screws
- Reinstall shelves and bins, plug in the refrigerator, and monitor for proper defrost operation
Safety Note: Always unplug the refrigerator before servicing. Be careful when removing ice buildup – never use sharp objects that could puncture the evaporator coils (this will destroy the sealed refrigeration system). Allow ice to melt naturally or use a hair dryer on low heat.
✓ Compatible Models
This defrost thermostat kit is compatible with Frigidaire, Electrolux, Gibson, Kelvinator, and other brand refrigerators and freezers. Always verify your model number and compare the part number on your existing thermostat before ordering.
IMPORTANT: Defrost thermostats are model-specific. If your current thermostat has a different part number, contact us for compatibility verification before ordering.
✓ Why Choose XPart Supply
- 30+ Years Experience: Canadian appliance parts experts since the 1990s
- Genuine OEM Parts: Factory-authorized Frigidaire replacement parts
- Expert Phone Support: Real technicians who can verify fit and answer installation questions
- Fast Canadian Shipping: Quick delivery across Canada
- Guaranteed Fit: We'll help you verify compatibility before you order
✓ Frequently Asked Questions
Q: How do I know if my defrost thermostat has failed?
A: The most common sign is excessive frost or ice buildup in the freezer that returns quickly after manual defrosting. If the evaporator coils are completely covered in ice and the refrigerator isn't cooling properly, the defrost system isn't working. You can test the thermostat with a multimeter – it should show continuity when cold (below 32°F) and no continuity when warm (above 40°F).
Q: Can I just manually defrost instead of replacing the thermostat?
A: Manual defrosting is a temporary fix. If the defrost thermostat has failed, frost will return within days or weeks because the automatic defrost cycle isn't working. You'll need to replace the thermostat to restore proper automatic defrost operation.
Q: What's the difference between the defrost thermostat and the defrost timer?
A: The defrost timer controls when the defrost cycle starts (typically every 8-12 hours). The defrost thermostat controls when the defrost heater turns off based on temperature. Both components work together – if either fails, the defrost system won't work properly. If you've replaced the thermostat and still have frost buildup, the timer or defrost heater may have failed.
Q: Is it safe to install this myself?
A: If you're comfortable accessing the evaporator compartment and can follow safety procedures (unplugging the unit, avoiding damage to the coils), this is a moderate DIY repair. The thermostat simply clips onto the coils and plugs into a wire harness. However, if you're not confident or if there's extensive ice buildup, consider hiring a qualified appliance technician.
Q: Will this fix a refrigerator that's completely not cooling?
A: If the refrigerator isn't cooling at all and there's no frost buildup, the problem is likely not the defrost thermostat – it could be the compressor, sealed system, or temperature control. The defrost thermostat specifically fixes problems caused by excessive frost and ice buildup blocking airflow. If you're unsure, contact our support team for diagnostic help.
5303918599 Frigidaire Refrigerator Defrost Thermostat Kit – OEM Replacement for Frost Buildup & Cooling Issues
5303918599 Frigidaire Refrigerator Defrost Thermostat Kit – Fix Your Refrigerator with Frost Buildup, Freezer Icing Over, Poor Cooling
The essential fix for a Frigidaire refrigerator or freezer with excessive frost buildup in the freezer, ice accumulating on the evaporator coils, poor cooling performance, freezer icing over completely, or a refrigerator that's not cold enough because the defrost system isn't working properly.
The defrost thermostat is a temperature-sensitive switch mounted on the evaporator coils that controls when the defrost heater turns on and off. During normal operation, frost naturally builds up on the evaporator coils as the refrigerator runs. The defrost system periodically melts this frost to prevent ice buildup. When the defrost thermostat fails — typically stuck open or stuck closed — the defrost cycle doesn't work correctly. A stuck-open thermostat prevents the defrost heater from turning on, causing frost and ice to accumulate until it blocks airflow and reduces cooling. A stuck-closed thermostat can cause the defrost heater to run too long, potentially damaging components.
✓ Common Symptoms Fixed
- Excessive frost buildup in the freezer compartment
- Freezer icing over completely and blocking vents
- Ice accumulating on the evaporator coils
- Refrigerator not cooling properly or not cold enough
- Freezer works but refrigerator is warm
- Frost buildup returns quickly after manual defrost
- Reduced airflow from freezer to refrigerator section
- Defrost heater never turns on during defrost cycle
✓ Key Features & Specifications
- Part Number: 5303918599
- Type: Defrost thermostat kit (includes thermostat and mounting hardware)
- Genuine OEM: Factory Frigidaire/Electrolux part for guaranteed fit
- Function: Controls defrost heater operation based on evaporator temperature
- Location: Mounted on the evaporator coils inside the freezer compartment
- Kit Includes: Defrost thermostat and mounting clips/hardware
- HS Code: 841869
- Weight: 5 lbs (shipping weight)
✓ Buying Options
New OEM: Genuine factory Frigidaire part with full warranty coverage. Guaranteed exact fit and performance identical to the original thermostat installed at the factory. Best choice for critical cooling system components where reliability matters.
✓ Installation Tips
Difficulty: Moderate – requires accessing the evaporator coils inside the freezer
Time Required: 45–60 minutes (plus defrost time if needed)
Tools Needed: Phillips screwdriver, flathead screwdriver, putty knife, towels (for water from melting ice)
Steps:
- Unplug the refrigerator from the wall outlet
- Remove all food from the freezer and allow ice to melt (or use a hair dryer on low heat)
- Remove the freezer shelves and bins
- Remove the screws securing the evaporator cover panel inside the freezer
- Carefully remove the cover panel to expose the evaporator coils
- Locate the old defrost thermostat clipped to the evaporator coils
- Disconnect the wire harness from the old thermostat
- Remove the mounting clip and pull off the old thermostat
- Install the new thermostat in the same position using the new mounting clip
- Reconnect the wire harness to the new thermostat
- Reinstall the evaporator cover panel and secure with screws
- Reinstall shelves and bins, plug in the refrigerator, and monitor for proper defrost operation
Safety Note: Always unplug the refrigerator before servicing. Be careful when removing ice buildup – never use sharp objects that could puncture the evaporator coils (this will destroy the sealed refrigeration system). Allow ice to melt naturally or use a hair dryer on low heat.
✓ Compatible Models
This defrost thermostat kit is compatible with Frigidaire, Electrolux, Gibson, Kelvinator, and other brand refrigerators and freezers. Always verify your model number and compare the part number on your existing thermostat before ordering.
IMPORTANT: Defrost thermostats are model-specific. If your current thermostat has a different part number, contact us for compatibility verification before ordering.
✓ Why Choose XPart Supply
- 30+ Years Experience: Canadian appliance parts experts since the 1990s
- Genuine OEM Parts: Factory-authorized Frigidaire replacement parts
- Expert Phone Support: Real technicians who can verify fit and answer installation questions
- Fast Canadian Shipping: Quick delivery across Canada
- Guaranteed Fit: We'll help you verify compatibility before you order
✓ Frequently Asked Questions
Q: How do I know if my defrost thermostat has failed?
A: The most common sign is excessive frost or ice buildup in the freezer that returns quickly after manual defrosting. If the evaporator coils are completely covered in ice and the refrigerator isn't cooling properly, the defrost system isn't working. You can test the thermostat with a multimeter – it should show continuity when cold (below 32°F) and no continuity when warm (above 40°F).
Q: Can I just manually defrost instead of replacing the thermostat?
A: Manual defrosting is a temporary fix. If the defrost thermostat has failed, frost will return within days or weeks because the automatic defrost cycle isn't working. You'll need to replace the thermostat to restore proper automatic defrost operation.
Q: What's the difference between the defrost thermostat and the defrost timer?
A: The defrost timer controls when the defrost cycle starts (typically every 8-12 hours). The defrost thermostat controls when the defrost heater turns off based on temperature. Both components work together – if either fails, the defrost system won't work properly. If you've replaced the thermostat and still have frost buildup, the timer or defrost heater may have failed.
Q: Is it safe to install this myself?
A: If you're comfortable accessing the evaporator compartment and can follow safety procedures (unplugging the unit, avoiding damage to the coils), this is a moderate DIY repair. The thermostat simply clips onto the coils and plugs into a wire harness. However, if you're not confident or if there's extensive ice buildup, consider hiring a qualified appliance technician.
Q: Will this fix a refrigerator that's completely not cooling?
A: If the refrigerator isn't cooling at all and there's no frost buildup, the problem is likely not the defrost thermostat – it could be the compressor, sealed system, or temperature control. The defrost thermostat specifically fixes problems caused by excessive frost and ice buildup blocking airflow. If you're unsure, contact our support team for diagnostic help.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
5303918599 Frigidaire Refrigerator Defrost Thermostat Kit – Fix Your Refrigerator with Frost Buildup, Freezer Icing Over, Poor Cooling
The essential fix for a Frigidaire refrigerator or freezer with excessive frost buildup in the freezer, ice accumulating on the evaporator coils, poor cooling performance, freezer icing over completely, or a refrigerator that's not cold enough because the defrost system isn't working properly.
The defrost thermostat is a temperature-sensitive switch mounted on the evaporator coils that controls when the defrost heater turns on and off. During normal operation, frost naturally builds up on the evaporator coils as the refrigerator runs. The defrost system periodically melts this frost to prevent ice buildup. When the defrost thermostat fails — typically stuck open or stuck closed — the defrost cycle doesn't work correctly. A stuck-open thermostat prevents the defrost heater from turning on, causing frost and ice to accumulate until it blocks airflow and reduces cooling. A stuck-closed thermostat can cause the defrost heater to run too long, potentially damaging components.
✓ Common Symptoms Fixed
- Excessive frost buildup in the freezer compartment
- Freezer icing over completely and blocking vents
- Ice accumulating on the evaporator coils
- Refrigerator not cooling properly or not cold enough
- Freezer works but refrigerator is warm
- Frost buildup returns quickly after manual defrost
- Reduced airflow from freezer to refrigerator section
- Defrost heater never turns on during defrost cycle
✓ Key Features & Specifications
- Part Number: 5303918599
- Type: Defrost thermostat kit (includes thermostat and mounting hardware)
- Genuine OEM: Factory Frigidaire/Electrolux part for guaranteed fit
- Function: Controls defrost heater operation based on evaporator temperature
- Location: Mounted on the evaporator coils inside the freezer compartment
- Kit Includes: Defrost thermostat and mounting clips/hardware
- HS Code: 841869
- Weight: 5 lbs (shipping weight)
✓ Buying Options
New OEM: Genuine factory Frigidaire part with full warranty coverage. Guaranteed exact fit and performance identical to the original thermostat installed at the factory. Best choice for critical cooling system components where reliability matters.
✓ Installation Tips
Difficulty: Moderate – requires accessing the evaporator coils inside the freezer
Time Required: 45–60 minutes (plus defrost time if needed)
Tools Needed: Phillips screwdriver, flathead screwdriver, putty knife, towels (for water from melting ice)
Steps:
- Unplug the refrigerator from the wall outlet
- Remove all food from the freezer and allow ice to melt (or use a hair dryer on low heat)
- Remove the freezer shelves and bins
- Remove the screws securing the evaporator cover panel inside the freezer
- Carefully remove the cover panel to expose the evaporator coils
- Locate the old defrost thermostat clipped to the evaporator coils
- Disconnect the wire harness from the old thermostat
- Remove the mounting clip and pull off the old thermostat
- Install the new thermostat in the same position using the new mounting clip
- Reconnect the wire harness to the new thermostat
- Reinstall the evaporator cover panel and secure with screws
- Reinstall shelves and bins, plug in the refrigerator, and monitor for proper defrost operation
Safety Note: Always unplug the refrigerator before servicing. Be careful when removing ice buildup – never use sharp objects that could puncture the evaporator coils (this will destroy the sealed refrigeration system). Allow ice to melt naturally or use a hair dryer on low heat.
✓ Compatible Models
This defrost thermostat kit is compatible with Frigidaire, Electrolux, Gibson, Kelvinator, and other brand refrigerators and freezers. Always verify your model number and compare the part number on your existing thermostat before ordering.
IMPORTANT: Defrost thermostats are model-specific. If your current thermostat has a different part number, contact us for compatibility verification before ordering.
✓ Why Choose XPart Supply
- 30+ Years Experience: Canadian appliance parts experts since the 1990s
- Genuine OEM Parts: Factory-authorized Frigidaire replacement parts
- Expert Phone Support: Real technicians who can verify fit and answer installation questions
- Fast Canadian Shipping: Quick delivery across Canada
- Guaranteed Fit: We'll help you verify compatibility before you order
✓ Frequently Asked Questions
Q: How do I know if my defrost thermostat has failed?
A: The most common sign is excessive frost or ice buildup in the freezer that returns quickly after manual defrosting. If the evaporator coils are completely covered in ice and the refrigerator isn't cooling properly, the defrost system isn't working. You can test the thermostat with a multimeter – it should show continuity when cold (below 32°F) and no continuity when warm (above 40°F).
Q: Can I just manually defrost instead of replacing the thermostat?
A: Manual defrosting is a temporary fix. If the defrost thermostat has failed, frost will return within days or weeks because the automatic defrost cycle isn't working. You'll need to replace the thermostat to restore proper automatic defrost operation.
Q: What's the difference between the defrost thermostat and the defrost timer?
A: The defrost timer controls when the defrost cycle starts (typically every 8-12 hours). The defrost thermostat controls when the defrost heater turns off based on temperature. Both components work together – if either fails, the defrost system won't work properly. If you've replaced the thermostat and still have frost buildup, the timer or defrost heater may have failed.
Q: Is it safe to install this myself?
A: If you're comfortable accessing the evaporator compartment and can follow safety procedures (unplugging the unit, avoiding damage to the coils), this is a moderate DIY repair. The thermostat simply clips onto the coils and plugs into a wire harness. However, if you're not confident or if there's extensive ice buildup, consider hiring a qualified appliance technician.
Q: Will this fix a refrigerator that's completely not cooling?
A: If the refrigerator isn't cooling at all and there's no frost buildup, the problem is likely not the defrost thermostat – it could be the compressor, sealed system, or temperature control. The defrost thermostat specifically fixes problems caused by excessive frost and ice buildup blocking airflow. If you're unsure, contact our support team for diagnostic help.
