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The 042N7457 is specifically a DC-voltage component
though you must never replace a 440V capacitor with a lower-rated 370V unit
ensure the sealing surface is wire-brushed clean for the best metal-to-gasket contact
replacing a fouled or cracked electrode with this genuine Armstrong 44992-001 ignitor is essential for restoring system safety and preventing nuisance lockouts
Does this unit include the mounting hardware and dial
Armstrong Furnace R43203-002 HSI Ignitor The 042N7457 is specifically aThe 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
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