Frost buildup on the evaporator coil typically indicates failures in the defrost system components, particularly the defrost timer, defrost heater, or defrost thermostat. These components play crucial roles in managing the melting of frost. Therefore, option C is the correct answer.
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Frost buildup on the evaporator coil typically indicates a failure in the defrost system components, particularly the defrost timer, defrost heater, or defrost thermostat. These components are essential for melting ice buildup. If any fail, they can lead to excessive frost accumulation. ;