View visual findings from this job here - https://visionshare.xoi.io/?id=XA-90AE-D0157617547E434E8CA1FA92AED3B132 Perform maintenance on well McLean gas fired water boiler with four zones: * Power down gas boiler * Remove boiler door, Flame guard, and roll out switch and all burner jets * Vacuum and dusted burner tray under heat, exchanger, clean, and clear * Vacuum and dusted all electrical wiring and components, clean and clear * Vacuum and dusted piping and components, clean and clear * Vacuum and dusted boiler room, clean and clear * Vacuumed and brushed all burner tubes, clean and clear * Cleaned flame sensor and spark igniter with copper bristle brush and polished clean with steel wool * Inspected heat, exchanger, flue, piping, inducer motor and assembly- okay * Test and check expansion tank, Water feed, Backflow preventer, and relief -okay * Customer approved the installation of a drip leg on the backflow preventer- Installed and secure drip leg in place * Reinstalled all bur