a different 70 Series or Blue Series model is required

Smith 100289433 Air Filter is a critical 14x14x1 disposable air filter designed for high-performance combustion air filtration in commercial and residential heating systems

This HVAC pressure safety valve includes a raised seat design that prevents water and sediment from being trapped

9 Amps to maintain peak airflow efficiency

Technicians generally see ignition failure codes

Lennox 74W76 Limit Switch 323080-701 a different 70 Series orThe Lennox 74W76 Limit Switch is a critical safety component designed for precise thermal regulation within residential and commercial Lennox HVAC systems. As a veteran grade furnace high limit switch, this OEM part is calibrated with a 200F cut out temperature to prevent heat exchanger damage and ensure safe operational cycles. This auto reset switch (Part #102135 11) is engineered for high demand environments, offering reliable continuity for