Performed a full heating tune-up on a 2022 trailer-style Oxbox system. Inspected and serviced the flue pipe, draft damper, operating controls, motors, air filters, burner assembly, combustion chamber, and ignition system. All components were tested and found to be operating within factory specifications. Noted that the blower wheel is dirty and recommended it be pulled and cleaned; pricing was provided, but the homeowner declined the additional service at this time.