The Lennox 30M03 Limit Switch is a critical safety component designed for precise thermal regulation within residential and commercial HVAC furnaces

using a switch with the exact water column rating is mandatory

For technicians servicing Trane or American Standard equipment

The York S1-025-27773-700 Flame Sensor is a critical OEM component designed for precise flame rectification in high-efficiency York gas furnaces and HVAC units

Hydrotherm BM-8807 Blower Assembly 321702-401 The Lennox 30M03 Limit SwitchThe Hydrotherm BM 8807 Blower Assembly is a high performance inducer blower replacement engineered specifically for Hydrotherm GV100 boiler systems. Also identified by the cross reference part number 7021 9093, this unit is essential for maintaining the correct static pressure and venting combustion gasses from the heat exchanger. As an OEM replacement part, it ensures precise fitment and restores the factory specified draft inducer performance