A board's spare thermistor inputs report whatever an open input reads, and the value rule from #5759 only catches the impossible ones. Once an hour, sensors.refresh judges each sensor against the host's CPU (Package id N, Tctl/Tdie/TccdN, PECI Agent N) over a week of hourly averages. A sensor is ruled out if it falls as the CPU warms (r <= -0.5) or holds within 0.5 °C while the CPU moved 10 °C or more. A judgment needs at least 72 shared hours. The host temperature leaves judged sensors out at ingest. The host page lists them under "Not counted", with each reason given once. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>