Armstrong Furnace R43203-002 HSI Ignitor While a 2-pole contactor can

While a 2-pole contactor can often replace a single-pole unit in the field

though you must never replace a 440V capacitor with a lower-rated 370V unit

Does this unit include the mounting hardware and dial

This 180-second delay relay is designed to prevent short-cycling

common issues include a clogged collector box port

Armstrong Furnace R43203-002 HSI Ignitor While a 2-pole contactor canThe Armstrong Furnace R43203 002 HSI Ignitor is a critical OEM replacement component engineered for precision ignition in Armstrong Air and Lennox family gas furnaces. As a high performance hot surface ignitor (HSI), this part is designed to reach the specific ohm range and temperature necessary to ensure consistent pilot free furnace ignition without tripping flame sensors or causing delayed ignition sequences. This genuine Armstrong replacement part