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This OEM Carrier flame sensor assembly (part# LH33WZ005) is the factory-specified replacement for the Carrier PY1PEA060120ADBA packaged unit. The flame sensor — also called a flame rod — monitors the burner during each ignition cycle using a small DC microamp current passed through the flame. When the control board detects that signal, it confirms combustion is active and holds the gas valve open. A failed or contaminated flame sensor causes the furnace to light, run briefly for 5–8 seconds, then shut down and lock out — often with a diagnostic fault code indicating "flame lost" or "no flame sense." Cleaning may temporarily restore function, but a failed rod or cracked ceramic insulator requires full replacement.
Compatibility: Engineered for Carrier model PY1PEA060120ADBA. Verify your existing part number against the unit's data plate or wiring diagram before ordering — our parts specialists are available to confirm fitment at no charge. Order by 3PM local time for same-day dispatch.