Does the cooling fan turn on when you turn on the heater?

Typically, the cooling fan does not turn on when you activate the heater in a heating system. The fan is usually designed to operate in conjunction with the air conditioning system or to circulate air when the heater is running to maintain a consistent temperature. However, in some systems, the fan may run intermittently to prevent overheating or to help distribute the heated air more effectively. Always refer to your specific system's manual for detailed operation guidelines.