What action is incorrect for the cold door fire procedure?

Keeping the door closed is the correct action in this scenario when dealing with a cold door fire procedure. This approach is crucial as it minimizes the risk of introducing fresh air to the fire, which could exacerbate the situation and lead to a rapid spread of flames. By maintaining the door closed, you can prevent the fire from gaining additional oxygen necessary for combustion.

When a fire is suspected behind a door, a common practice is to check for heat on the door's surface before considering entry. If the door is cold or only warm to the touch, it may indicate that the fire is not directly behind it, but that doesn't guarantee safety. Keeping the door closed while assessing the situation helps to maintain control over the environment and the spread of smoke and flames.

In contrast, fully opening the door could allow oxygen to feed the fire, while partially opening may still introduce some air but with a controlled release. Using the extinguisher in a sweeping motion is also a proper technique during fire suppression; however, it should occur once the situation has been assessed and the door is safely opened. Thus, keeping the door closed initially is a protective measure that ensures safety during a fire emergency.