Lennox 40K82 Control Board 326070-701 the Robertshaw 41-401 Hot Surface

the Robertshaw 41-401 Hot Surface Ignitor is the industry-standard silicon carbide solution

"Limit Circuit Open" error codes

Enhanced System Logic: Provides the critical data needed for de-icing cycles and high-limit safety protocols

which must be sourced separately based on your application's alignment and temperature requirements

Lennox 40K82 Control Board 326070-701 the Robertshaw 41-401 Hot SurfaceThe Lennox 40K82 Control Board, also identified as the BDC3 1 Blower Circuit Control Module (Part # 40K8201), is a critical OEM component manufactured by Computime (LEN408C) for high performance Lennox residential and light commercial HVAC systems. Operating on a 24V circuit with a 1 Amp rating, this board serves as the primary blower motor control relay and timing module, ensuring precise airflow management during both heating and cooling cycles.