If there are issues with the beer pump or FOB, what is the immediate action to take?

Choosing to reset the FOB (foam on beer) and check gas flow is the most appropriate immediate action when issues arise with the beer pump or FOB. The FOB is a device used to prevent beer from spilling or foaming excessively by determining when the line is filled appropriately. If there's a malfunction, resetting the FOB can help clear any stuck sensors or mechanical issues that may be causing the problem.

Additionally, checking the gas flow is crucial because adequate gas pressure is necessary to push the beer from the keg to the tap. If the gas flow is insufficient, it could lead to improper pouring and excessive foaming. Therefore, addressing these two aspects—resetting the FOB and ensuring proper gas flow—directly tackles the problem and allows for a quick resolution, maintaining the integrity of the beer service.

Other options, while they may have their importance in managing beer service, do not address the immediate nature of the issue at hand. Replacing the FOB might be necessary later but is not a quick fix, increasing beer temperature could exacerbate the problem, and adjusting keg pressure may not directly resolve the malfunction of the FOB or the pump system.