Heat pump efficiency hinges on proper use and care. Avoid extreme thermostat changes, skipped filter or heat‑exchanger cleaning, blocked outdoor units, unauthorized refrigerant handling, continuous full‑load operation, placement in damp areas, uninsulated piping, frequent full power‑cycling, and ignoring manuals or warranties. Mindful operation protects your initial heat pump installation cost and minimizes future heat pump replacement cost, whether for air source heat pump installation or geothermal heating and cooling.