Modine 3H0400780001 Limit Switch R-407A Serving as the primary Venstar

Serving as the primary Venstar VST2900 replacement

Precision Operation: Low 3 PSI differential prevents excessive short-cycling and protects system piping from shock

The Lennox 36M22 is built with galvanized steel for superior corrosion resistance and features a precision-balanced convex hub to minimize vibration and bearing wear

this unit can replace single or double pole relays provided the 24V coil voltage and 7A load ratings align with the original specifications

Built with a high-leverage valve linkage and a durable die-cast aluminum housing

Modine 3H0400780001 Limit Switch R-407A Serving as the primary VenstarThe Modine 3H0400780001 High Limit Switch is a critical safety component designed for heavy duty HVACR applications where thermal protection is paramount. This L165 40F limit switch is engineered to monitor excessive heat buildup, featuring a precise 165 degree Fahrenheit trip point. As a veteran grade HVAC replacement part, it functions as a primary fail safe by interrupting the electrical circuit (typically 20 amps at 120 240 VAC) when the