Several factors can cause a heat pump to stop cooling effectively. Some common reasons include: Low refrigerant levels due to leaks Dirty or clogged air filters Iced-over or dirty coils Malfunctioning thermostat Electrical issues To prevent these issues, it's essential to schedule regular maintenance for your heat pump. At Burkett's Heating & Cooling, we can help you with heat pump repair in Piqua, OH, and provide routine maintenance to ensure your system operates efficiently.