Which element can contribute to the furnace blower motor failure?

The correct answer highlights the role of the thermocouple function in relation to furnace blower motor failure. The thermocouple is a critical component that senses the temperature in the furnace and helps ensure that the gas valve opens appropriately, allowing the furnace to operate safely and efficiently. If the thermocouple is malfunctioning, it may lead to improper operation of the furnace, including the blower motor.

While the blower motor failure can be influenced by a number of factors, a faulty thermocouple could prevent the entire system from functioning correctly, as it might not signal the blower motor to activate at the right time, leading to overheating and potential motor failure. Understanding the intricacies of furnace components such as the thermocouple can aid in troubleshooting and maintaining effective operation of heating systems.