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many Lennox systems utilize a crankcase thermostat (S40) to cycle the heater based on ambient or liquid line temperatures for energy efficiency
OEM Compatibility: Exact drop-in replacement for York 492-16939-005
The Weil McLain 511-330-080 Pilot Burner Assembly is a precision-engineered OEM replacement part designed for reliable ignition in residential gas boilers
this unit comes with the necessary bracket and connector for standard furnace configurations
Siemens Building Technology 331-4810 Actuator R-448A many Lennox systems utilize aThe Siemens 331 4810 is a rugged, metal fabricated No. 3 Pneumatic Actuator engineered for reliable modulating or two position control of HVAC dampers and terminal units. Built with all metal construction and a totally enclosed housing, this 331 Series actuator is a staple for contractors maintaining mixing box dampers, unit ventilators, and air valves. It features a 2 3 8 inch stroke and a nominal 8 13 psi spring range, allowing for precise