Lennox 72L27 Thermostat 320788-703 this fixed blower pulley is

this fixed blower pulley is the preferred choice over variable sheaves to ensure long-term setting stability

this double inlet blower wheel utilizes 43 blades and a convex disc design to optimize cfm output and maintain system static balance

Does the valve ship in the open or closed position

What is the maximum temperature the sensor can withstand

Lennox 72L27 Thermostat 320788-703 this fixed blower pulley isThe Lennox 72L27 Defrost Thermostat is a critical safety and performance component designed for precise temperature regulation in Lennox heat pump systems. This heavy duty bimetal defrost sensor functions by monitoring coil temperatures and initiating the defrost cycle once frost accumulation reaches specific thresholds, typically closing at 42F and opening at 75F. Engineered for longevity in harsh outdoor environments, the 72L27 ensures the outdoor