It features dual 1/4" SAE flare connectors

Nitrogen Dioxide (NO2) is typically heavier than air

The Robertshaw 190-071 Metal Guard

Using a non-matching switch can lead to ignition failure

York S1-373-28175-000 Ignition Control Kit Els PW 29614 It features dual 1/4" SAEThe York S1 373 28175 000 Ignition Control Kit is a microprocessor based OEM replacement control board engineered for high performance gas furnace applications. This veteran grade HVAC ignition module provides precise sequence control, managing the vent blower, hot surface ignitor, and gas valve with industrial grade reliability. Designed to replace aging or faulty controls in specific York and Coleman residential heating units, it monitors critical