If the control board displays a sensor failure code

and 6 washers to facilitate a full flange-to-pipe-adapter connection

as skin oils can create hot spots that lead to premature failure

leading to uneven hot or chilled water flow and increased energy consumption across the HVAC system

This transformer features rugged construction designed to handle the high-cycle demands of residential and industrial heating environments

Armstrong Furnace R43203-002 HSI Ignitor If the control board displaysThe 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