**Work Performed:** Completed maintenance on 2006 ICP single-stage furnace. **Results:** * Furnace operating normally at this time. * No safety issues found. * System clean and functioning well for its age. **Furnace Maintenance Checklist:** * [x] Checked thermostat operation-older, still in working order * [x] Verified ignition and flame sensor operation * [x] Inspected burners and heat exchanger-checked co levels * [x] Checked blower motor and wheel * [x] Verified pressure switch and safety controls * [x] Inspected condensate line-added viniger * [x] Checked filter condition-client changes frequently * [x] Verified proper airflow and temperature rise * [x] Inspected venting system * [x] Confirmed overall system performance All components tested within normal operating range. Continue annual maintenance to ensure reliability.