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Improper maintenance is a significant reason for fire alarm systems to fail because consistent and thorough upkeep is essential for ensuring that all components function as intended. Fire alarm systems rely on various devices, such as smoke detectors, heat detectors, and control panels, which require regular inspections, cleaning, and testing to remain operational.

Over time, dust and debris can accumulate, leading to false alarms or failure to detect an actual fire. Additionally, components like batteries or circuitry may degrade without scheduled replacement or servicing, further compromising system reliability. By neglecting maintenance, critical warning systems could become nonfunctional, putting lives and property at risk during a fire emergency.

In contrast, factors like poor installation location, insufficient power supply, and outdated technology also contribute to system failures but do not encompass the ongoing requirements that proper maintenance ensures. While installation locations should be chosen thoughtfully, and power supply needs to be adequate, it is the regular maintenance that directly impacts the day-to-day operational status of the fire alarm system, ultimately determining its effectiveness when needed most.