Replace boiler. Drained boiler and system piping. Disconnected electrical, venting and boiler system piping. Removed old boiler. Installed new boiler on the wall. Connected piping to the remaining system pipes. Reconnected electrical and venting. Filled and purged system. Installed new WiFi thermostat. Cycled F5 boiler cleaner through system. Purged all cleaned from the system and added F1 protector. Ran and tested unit. Preformed combustion analysis. All systems operating properly at this time. Thanks, Brennan, Brad, Bradley, Scott and Adam