View visual findings from this job here - https://visionshare.xoi.io/?id=XA-57DC-6DFE29F0AFA34445A49410C7CCE05C52 Perform maintenance on three zone well McLean boiler: * At arrival, the power to the boiler is off at the switch * The customer stated that he had a contractor replaced two circulator pumps and add an additional baseboard zone to the basement * The customer did not trust the contractor and believes that there is an air in the system * The boiler is old and outdated, and has been neglected and covered in dust debris * Remove boiler door shut down gas valve * Remove flame, guard, and all burner tubes from boiler * Vacuum and dusted out lots of debris from burner section under heat exchanger * Vacuumed and brushed all burner tubes, clean and clear * Vacuum and dusted boiler cabinet, Components and oil piping * Test and inspect water feed / Backflow / Expansion tank air vent and relief- okay * Confirm boiler pressure is normal * Thermocouple is showing heavy signs of wear an