I conducted a comprehensive heating and air conditioning repair service for Marlene. The work began with a thorough inspection of the HVAC system to identify any issues. I replaced a faulty thermostat and repaired a refrigerant leak. Additionally, I cleaned and serviced the air filters and coils, ensuring optimal performance. The system was tested to confirm efficiency and reliability. Marlene's satisfaction was confirmed through a follow-up call, ensuring the repairs met her needs.