No Heat CO in house boiler system Took apart and redid gas line connections from both unions to where main line comes into the house. Several connections had no pipe dope, some were hand tight. Ameren gas guy on his way out to check for leaks, coming back tomorrow afternoon to clean boiler and test system Returned next day, cleaned boiler as best I could, replaced rotted flue pipe, redid gasket on burner box, tested heat, shuts off and turns on correctly, checked co readings in and around flue and boiler system is heating correctly