Heating Repair Service: Upon arrival at a property with a malfunctioning heat pump exhibiting erratic behavior between heating and cooling modes, I delved into a thorough inspection. The root cause was determined to be a faulty reversing valve. I replaced the defective valve, ensuring that the heat pump could seamlessly switch between heating and cooling modes as intended, thereby restoring its operational functionality. With the system's proper function confirmed, I discussed our maintenance plans with the homeowner to ensure the system's ongoing efficiency.