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

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

Technicians generally see ignition failure codes

Dual-Purpose Design: Configurable for either mixing or diverting applications to suit various hydronic and steam circuit layouts

a different 70 Series or Blue Series model is required

Lennox 74W76 Limit Switch 323080-701 This HVAC pressure safety valveThe 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