Consistent Millivolt Output: Optimized thermocouple positioning ensures a stable 25-30mV signal for reliable gas valve operation

65-inch trigger point

this triple-action aquastat performs three essential functions: temperature limit control

22 certified for use with natural

Lennox 17F38 Collector Box 318820-201 Consistent Millivolt Output: Optimized thermocoupleThe Lennox 17F38 Collector Box is a critical OEM replacement component engineered for high efficiency condensing furnaces. As a primary furnace flue collector, this part is responsible for gathering combustion byproducts and corrosive condensate from the secondary heat exchanger and channeling them safely toward the inducer motor and drainage system. Manufactured with high grade, heat resistant composite materials, the Lennox 17F38 is designed to