Why is there a delay in blower motor operation when a furnace’s burners are ignited?

The correct answer is linked to the function of the heat exchanger within the gas furnace system. When the burners are ignited, there is a necessary delay before the blower motor activates to ensure that the heat exchanger has adequately warmed up. If the blower were to turn on too early, it could blow cold air into the living space, leading to discomfort.

By allowing time for the heat exchanger to warm, the furnace guarantees that when the blower motor does engage, it distributes heated air throughout the home effectively. This sequence enhances energy efficiency and ensures the system operates as intended, maintaining comfortable temperatures while avoiding unnecessary cycling of the furnace.

The other options don't accurately represent the primary purpose of the delay. For example, while gas pressure stability and verifying the burner flame presence may be important functions, they do not directly relate to the timing of the blower motor's operation following ignition. Likewise, the cooling of the fan is not a relevant factor here, since it is not the reason for the intentional delay in blower activation after the burners ignite.