Performed a steam boiler diagnostic in Norristown, PA 19401. Found the gas valve producing a pounding noise, CO levels over 100 ppm, and a rusted, leaking boiler return line. Also noted a rusted sight glass with valves, a malfunctioning water sensor, a failed system pressure gauge, improperly leveled radiators, and one leaking steam valve. Provided the homeowner with detailed repair recommendations to restore safe, efficient operation.