Weil McLain 510-350-066 Limit

The Weil McLain 510-350-066 Limit is a temperature-actuated control component used in compatible heating equipment. Installed in residential and light commercial HVAC systems, it monitors internal operating conditions and responds when preset thermal thresholds are reached by opening or closing the control circuit. It is applied in hydronic heating applications to support controlled operation of the burner and circulation sequence. It helps manage operating temperature limits, coordinates shutdown and restart cycles based on heat levels, and ensures stable operation of connected components during normal heating performance.