The 8200-004 is the structural mount itself

Safety Compliance: Directly interfaces with the furnace control board to prevent ignition if the inducer path is restricted

The 3Z1B adapter kit features a rugged construction

Precise Millivolt Signal: Provides a stable voltage to the gas valve magnet

Lennox 14B54 Thermostat The 8200-004 is the structuralThe Lennox 14B54 is a specialized heat pump thermostat designed for precise climate control in residential and commercial applications. Also identified by the manufacturer as Lennox 14B5401, this unit is an OEM replacement HVAC thermostat engineered to maintain indoor comfort through efficient staging of heating and cooling cycles. It features an integrated thermostat service light, which provides immediate visual diagnostics by illuminating when the