Performed a precision tune-up, confirming that everything was working well. Noticed slight mold growth starting and suggested installing an I-Wave air purifier; the customer agreed, so we will return to complete the installation. We need to order three 30x10x1 filters as we did not have this size in stock. Additionally, I installed a new Honeywell RTH9585WF thermostat and tested it for proper operation, ensuring the system runs efficiently. Our proactive approach ensures optimal indoor air quality and system performance.