1. Performed preventative maintenance on Coleman Gas Furnace. Homeowner addressed that he had already replaced 20x25x1 air filters just a couple weeks ago as they look in good condition. Completed combustion analysis and CO PPM 0. Cleaned and inspected burners, flame sensor and blower compartment. Verified proper amperage on motors. System is working properly and ready for the season! 2. Performed preventative maintained on Goodman Furnace Heat Pump. Homeowner addressed that he had already replaced 14x30x1 air filter just a couple weeks ago as it looks in good condition. Checked both indoor and outdoor unit and are working properly. System is ready for the season!