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it ensures the system safely cycles off if high-limit thresholds are reached and restores operation once temperatures normalize
this specific board is tailored for the HE150 Small Advanced Bypass model
the specific BTU output and performance are determined by the gas orifice size and manifold pressure
The Lennox 74W75 Limit Switch is a genuine OEM safety component specifically calibrated to open the circuit at 225°F
Lennox 73M70 Replacement Kit 319852-301 it ensures the system safelyThe Lennox 73M70 IMC Replacement Kit is a critical GP1 1 service part designed for technicians servicing integrated modular controllers in Lennox commercial rooftop units and high capacity split systems. This genuine Lennox control board serves as a direct replacement for the LB 109490A IMC kit, providing the necessary processing power to manage complex HVAC system diagnostics, blower timing, and multi stage heating or cooling calls. Engineered for