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This is the genuine OEM Carrier flame sensor assembly (part #LH33WZ005) factory-specified for the Carrier PY1PNA060100AEBA packaged unit. The flame sensor — also called a flame rod — is a safety-critical component that detects the presence of a burner flame by passing a small rectified current through the flame to ground. When the sensor is contaminated with oxide buildup or has failed entirely, the control board cannot verify combustion is occurring and will shut down the gas valve within 5–8 seconds of ignition, causing the unit to enter a safety lockout. This results in a no-heat condition that repeats on every call for heat until the sensor is replaced.
Compatibility: Designed as the direct OEM replacement for the Carrier PY1PNA060100AEBA packaged unit. Verify part number LH33WZ005 against your unit's data plate or wiring diagram before ordering. Our team is available to confirm fitment prior to purchase — contact us before you order if you have any questions.