I successfully installed a new thermostat, ensuring it was properly configured to meet the client's heating and cooling preferences. The installation process involved carefully removing the old thermostat, labeling the wires for accurate reconnection, and mounting the new unit at an optimal height for ease of use. I also calibrated the settings to ensure efficient energy use and comfort. Additionally, I provided a comprehensive demonstration of the thermostat's features, including scheduling, temperature adjustments, and energy-saving modes. The client was pleased with the improved functionality and ease of operation.