Lennox 98P78 Hot Surface Ignitor Els PW 17895 Common indicators include the furnace

Common indicators include the furnace blower running continuously without heat

The T-4000-610 focuses on the internal adaptor and pipehead connection

leak-proof interface between the valve bracket and the float chamber

Most failures result from system contamination or wax buildup due to moisture

The York S1-3110-3301 is a heavy-duty 24V DPST 6 terminal fan relay engineered for precise blower motor sequencing in residential furnace and air handler applications

Lennox 98P78 Hot Surface Ignitor Els PW 17895 Common indicators include the furnaceThe 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