What issue is indicated by a sump pump that continues to short cycle after a very light rainstorm?

A sump pump that continues to short cycle after a very light rainstorm suggests that the switch is likely set too low for the weather condition. In this scenario, the switch controls when the pump turns on and off based on the water level in the sump pit. If it is set too low, even a small amount of water will trigger the pump to activate, leading to frequent on-off cycling. This short cycling is inefficient and can cause wear and tear on the sump pump over time, but it indicates a problem with the switch's setting rather than the functionality of the pump itself.

Understanding the mechanism of a sump pump and its switch can help identify such issues more effectively. Other choices may imply different underlying problems, but in this case, the switch setting is the most likely culprit causing the frequent activation during minimal rainfall.