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Professional-grade Intermatic K4221C Control units are the industry standard for reliable dusk-to-dawn lighting control
critical for maintaining system pressure
Is the 621098R compatible with the older 621098 model
This sensor is a genuine Lennox HVAC part but is also used in equipment from Allied
Lennox 98P78 Hot Surface Ignitor Els PW 17895 Professional-grade Intermatic K4221C Control unitsThe Lennox 98P78 Hot Surface Ignitor is a critical OEM replacement component designed to ensure consistent glow ignition in residential gas furnaces. Also identified by the part number 98P7801, this 120V silicon carbide igniter is engineered for high temperature durability and rapid thermal response. As a ceramic block style Type B ignitor, it serves as a direct drop in for various Lennox HVAC systems, as well as specific compatible units from Rheem
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