Which situation could lead to an improper operation of a furnace converted from natural gas to LP gas?

A furnace converted from natural gas to LP gas can face improper operation due to several key factors, each of which plays a crucial role in ensuring safe and efficient furnace operation.

The proper functioning of a furnace relies on the correct type of gas and the necessary adjustments to components after conversion. Using an incorrect regulator can lead to variations in gas pressure, resulting in either too much or too little fuel being supplied to the burner. This imbalance can cause the furnace to operate inefficiently or not at all, and in some cases, it may pose a safety risk due to incomplete combustion.

Inadequate combustion air is another critical issue. LP gas requires a specific amount of air to combust properly, and if there isn’t sufficient air, it could lead to poor combustion efficiency, potentially creating harmful carbon monoxide emissions and reducing the heat output of the furnace.

Exceeding the heating capacity may also cause problems, as an oversized furnace can cycle on and off more frequently than intended, leading to premature wear on components and reduced efficiency.

Therefore, each of these situations—regardless of being individual factors or combined—can contribute to the improper operation of a furnace converted from natural gas to LP gas, making "all of the above" the correct response. It emphasizes