Random alarms on the Kidde KI-HFD can be caused by a few different factors. Firstly, ensure that the smoke detectors are clean and free from any dust or debris that could trigger false alarms. Additionally, check the placement of the detectors to ensure they’re not too close to sources of steam or cooking fumes, which could also set off false alarms. If the issue persists, try resetting the system by powering it off and then back on again. If none of these steps resolve the problem, it’s possible there’s a malfunction in the unit itself, and you may need to contact Kidde customer support for further assistance.