Method for operating a fan within a refrigerator appliance

1. A method for operating a fan within a refrigerator appliance, the fan comprising a temperature sensor positioned proximate an impeller of the fan such that the temperature sensor is exposed to air drawn by the impeller, the method comprising:

initiating a defrost cycle of the refrigerator appliance;

monitoring an output of the temperature sensor of the fan during the defrost cycle;

terminating the defrost cycle in response to the output of the temperature sensor reaching a threshold temperature; and

determining that the fan is defective in response to the output of the temperature sensor being greater than a freezing temperature of water and a speed of the fan being less than a threshold speed,

wherein the fan further comprises a motor coupled to the impeller and a control board in operative communication with the motor, the temperature sensor positioned on the control board of the fan.

2. The method of claim 1 , wherein the temperature sensor comprises a thermistor.

3. The method of claim 1 , wherein the refrigerator appliance further comprises an evaporator and a defrost heating element, the fan positioned adjacent at least one of the evaporator or the defrost heating element.

4. The method of claim 3 , wherein said step of terminating the defrost cycle of the refrigerator appliance comprises deactivating the defrost heating element.

5. The method of claim 3 , wherein said step of initiating the defrost cycle of the refrigerator appliance comprises terminating a flow of refrigerant through the evaporator.

6. The method of claim 1 , wherein the motor of the fan is deactivated during said step of monitoring.

7. The method of claim 1 , wherein said step of initiating comprises initiating the defrost cycle of the refrigerator appliance when the output of the temperature sensor of the fan is less than the freezing temperature of water for a predetermined period of time prior to said step of initiating.

8. The method of claim 1 , wherein the fan is positioned at a fresh food chamber, a freezer chamber or an ice box of the refrigerator appliance.

9. A method for operating a fan within a refrigerator appliance, the fan comprising a temperature sensor positioned proximate an impeller of the fan such that the temperature sensor is exposed to air drawn by the impeller, the method comprising:

initiating a defrost cycle when a temperature measurement of the temperature sensor of the fan is less than a freezing temperature of water for a predetermined period of time;

monitoring the temperature measurement of the temperature sensor of the fan during the defrost cycle; and

terminating the defrost cycle in response to the temperature measurement of the temperature sensor exceeding a threshold temperature; and

determining that the fan is defective in response to the temperature measurement of the temperature sensor being greater than a freezing temperature of water and a speed of the fan being less than a threshold speed,

wherein the fan further comprises a motor coupled to the impeller and a control board in operative communication with the motor, the temperature sensor positioned on the control board of the fan.

10. The method of claim 9 , wherein the temperature sensor comprises a thermistor.

11. The method of claim 9 , wherein the refrigerator appliance further comprises an evaporator and a defrost heating element, the fan positioned adjacent at least one of the evaporator or the defrost heating element.

12. The method of claim 11 , wherein said step of terminating the defrost cycle of the refrigerator appliance comprises deactivating the defrost heating element.

13. The method of claim 9 , the motor of the fan is deactivated during said step of monitoring.

14. The method of claim 9 , wherein the fan is positioned at a fresh food chamber, a freezer chamber or an ice box of the refrigerator appliance.