Corrosion Resistance: The nickel-plated bulb is built to withstand harsh environments and immersion without pitting or scale buildup

The 10728306 is an automatic reset thermal switch

For contractors managing legacy system upgrades or new Schneider Electric HVAC controls

The internal spring mechanism will drive the valve to the fully open position if the 24V power supply is interrupted

Lennox 93M04 Crankcase Heater 320788-704 Corrosion Resistance: The nickel-plated bulbThe Lennox 93M04 Crankcase Heater is a critical HVAC replacement part designed to maintain optimal compressor oil temperature during the off cycle. This OEM crankcase heater, cataloged as part number 93M0401 and often identified by model 100499 01, is a belt style heater engineered for high performance heating in commercial HVAC systems and residential split units. Operating at 240 Volts with a 40 watt power rating, it provides the precise thermal