How can pulsation in a gas furnace be corrected?

Pulsation in a gas furnace can often be caused by an imbalance in the air-fuel mixture or improper draft conditions. Increasing the draft helps to ensure that adequate air is supplied to the burner, which can stabilize the combustion process. When there is enough air available, it ensures complete combustion of the gas, reducing the likelihood of fluctuations that contribute to pulsation.

In addition, a stronger draft can help to maintain a consistent flow of combustion gases and prevent back pressure, which may exacerbate pulsation effects. Properly balanced drafts are critical in achieving stable burner operation, ultimately leading to smoother and more efficient performance of the gas furnace.

The other choices do not adequately address the root cause of pulsation. Decreasing the air-fuel mixture or reducing the draft could worsen the situation by limiting the necessary air for combustion, resulting in incomplete burning and potentially increasing fluctuations. Adjusting the burner tip could help to fine-tune the combustion but might not directly address the draft-related issues that often cause pulsation. Thus, increasing the draft is typically the most effective solution.