Heating System Repair: Responding to a property with a malfunctioning heat pump showing irregular behavior, I conducted a comprehensive inspection to pinpoint the issue. The diagnosis revealed a faulty reversing valve as the root cause. Efficiently replacing the defective valve, I ensured smooth transitions between heating and cooling modes, restoring the system's operational functionality. After confirming the proper function of the system, I engaged in a discussion with the homeowner about tailored maintenance plans for sustained efficiency.