Blomberg Fridge 4919820700 thermal insurance

Blomberg Refrigerator Thermal Insurance – Part #4919820700

The Thermal Insurance (Defrost Thermal Protector) is a safety device installed in the defrost heater circuit of select Blomberg refrigerators and freezers. It protects the system from overheating during the defrost cycle and ensures safe and proper ice melt operation inside the freezer compartment.

If this component fails open, the defrost heater will not operate — often leading to heavy frost buildup and cooling problems.

✅ Key Details

Part Number: 4919820700

Compatible Brands: Blomberg

7281045518, 7281045718, 7288945514, 7282745582, 7282745583, 7282745584, 7282745585, 7282747585, 7288945714, 7288947514, 7288947515, 7293743585, 7293744582, 7293745581, 7293745787, 7293749581, 7293749588, 7293749592, 7294045591, 7294645511, 7294647510, 7295344580, 7295745510, 7295745710, 7295747512, 7518220012, 7518220013, 7518220014, 7518220015, 7518220016, 7278440516, 7278440594, 7278440595, BFFD3624SS, BFFD3626SS, BRFB1050FFBI.

Type: Defrost Thermal Protector / Thermal Fuse

Function: Protects the defrost heater circuit from overheating by cutting power at unsafe temperatures

Typical Location: Attached to the evaporator assembly inside the freezer compartment

Original Equipment Manufacturer (OEM) Part: Yes

This part is designed specifically for use in select Blomberg refrigerators and freezers. Always verify your model number before ordering to ensure compatibility.

⚠️ Common Issues This Part Can Solve

Replacing the thermal insurance can resolve several freezer and defrost-related problems, including:

Freezer overfreezing due to failed defrost cycle

Heavy frost or solid ice buildup on evaporator coil

Freezer door not closing properly because of ice accumulation

Water leaking from freezer into refrigerator section

Ice blocking air vents causing poor airflow

Refrigerator running continuously due to frozen evaporator

Defrost heater not activating because thermal protector is open

If the defrost heater and control board test good but the heater does not receive power, the thermal protector may be open and require replacement.

❓ FAQs (Frequently Asked Questions)

Q: How do I know if the thermal insurance is faulty?
A: If the evaporator is heavily iced over and the defrost heater tests good but does not energize, the thermal protector may have failed open. Continuity testing with a multimeter can confirm this.

Q: Is this the same as a temperature sensor?
A: No. This is a safety thermal fuse, not a thermistor. It does not regulate temperature — it protects the heater from overheating.

Q: Is it difficult to replace?
A: Moderate skill is required. Access typically involves removing freezer panels to reach the evaporator assembly. Otherwise, you may want to book a professional appliance repair in Vancouver to ensure proper installation and avoid further issues.

Q: What causes it to fail?
A: Overheating during a defrost cycle, airflow restrictions, or electrical faults in the heater circuit.

Q: Can I bypass it temporarily?
A: No. This is a safety device and should never be bypassed. Replace with the correct OEM part only.

🛠️ Installation Tips

Disconnect power before servicing

Remove freezer interior panels carefully

Inspect defrost heater and wiring while replacing

Ensure proper mounting against evaporator tubing

Test defrost cycle operation after installation

NOTES:

1. Canceled parts orders are subject to a 25% restocking fee

2. Parts ordered by “Special Order Condition” are not refundable