This model is constructed from lead-free materials to comply with federal regulations for potable water systems

The Nordyne 626548R Limit Switch is a critical safety component designed for high-limit temperature monitoring in Intertherm

What does the green color code signify on these controls

the ST-D24 thermistor ensures tighter setpoint control and improved system efficiency across various air handling unit (AHU) configurations

preventing lead separation under thermal expansion

Lennox 66J78 Limit Switch Els PW 17895 This model is constructed fromExperienced HVAC contractors recognize the Lennox 66J78 Limit Switch as a critical safety component for maintaining furnace integrity and preventing heat exchanger damage. This OEM Lennox replacement part is a 36T series disc style control designed for High Limit or Secondary Rollout applications. It features a Normally Closed (NC) circuit that opens on temperature rise to interrupt the heating cycle if internal temperatures exceed safe operating