Lochinvar & A.O. Smith 100074280 Limit Switch 319848-301 fully welded design ensures reliable

fully welded design ensures reliable performance in demanding environments

Dual Configuration Support: Includes two pipehead adaptors

The integrated visual indicator and junction box (NEMA 1 enclosure) allow for immediate status verification and simplified electrical installation

and PGMD series

This open deep groove ball bearing features a 52100 high-carbon chrome steel construction

Lochinvar & A.O. Smith 100074280 Limit Switch 319848-301 fully welded design ensures reliableThe Lochinvar & A. O. Smith 100074280 High Limit Switch is a critical safety component engineered to provide thermal protection in high efficiency heating systems. Designed as a genuine OEM replacement part, this switch monitors the internal temperature of the heat exchanger or burner door to prevent unsafe operating conditions. If temperatures exceed the factory defined safety threshold, the 100074280 triggers an immediate system lockout to mitigate