Inspectors in the Boiler Division issue this type of violation. This violation is issued either as a result of a complaint, as a result of a scheduled inspection for an application, or as part of a review of previously issued violations. It is the most common type of all boiler violations issued by inspectors. The violation is used when any part of the boiler is not in a safe condition. The owner is responsible at all times for the safe maintenance of the building and its facilities. The violation can be "Cured" if no hearing has yet been held and it is not a hazardous or second offense violation.

Violations related to boilers, a common heating device where water is converted to steam. Common infractions relate to improper maintenance (dirty boilers) and lack of fire door on a boiler room, which is a hazardous condition.