I recently completed a comprehensive heating and air conditioning repair service for a client. Upon arrival, I conducted a thorough inspection of the HVAC system to identify any issues. I discovered that the thermostat was malfunctioning, causing inconsistent temperature control. Additionally, there was a blockage in the air filter, which was hindering proper airflow. I replaced the faulty thermostat and cleaned the air filter to ensure optimal performance. Furthermore, I checked the refrigerant levels and found them to be low, so I refilled them to the appropriate level. After completing these repairs, I tested the system to confirm that both heating and cooling functions were working correctly. The client was pleased with the restored comfort and efficiency of their HVAC system.