Heating, Ventilation, and Air Conditioning (HVAC ) Electrical Practice Test

Which component does the coil on line #11 NOT control?

1. The condenser fan motor

2. The compressor

3. The blower motor

4. The thermostat

The correct answer is: The blower motor

The coil on line #11 is typically associated with controlling specific components in an HVAC system. In most HVAC systems, the primary functions of coils are to manage key operational elements such as the condenser fan motor, compressor, and thermostat. Understanding the roles of these components helps to clarify why the blower motor is not controlled by the coil on line #11. The condenser fan motor is responsible for dispersing heat absorbed by the refrigerant as it travels from the compressor to the condenser, and the coil plays a critical role in activating this motor. Similarly, the compressor, which compresses the refrigerant and circulates it through the system, is also controlled by signals from the coil. The thermostat serves to monitor the indoor temperature and communicates with the coil to initiate cooling or heating cycles based on the needs of the space. In contrast, the blower motor is involved in circulating air within the ductwork of the heating or cooling system. The operation of the blower motor is usually governed by separate controls tied to the fan relay and the system's thermostat. Therefore, while the coil on line #11 directly influences the condenser fan motor, compressor, and thermostat, it does not control the blower motor, which operates independently to manage airflow throughout the indoor environment. This delineation