OEM Carrier Flame Sensor Assembly LH33WZ005 for Model PY1PNA042080ACBA

This is the genuine OEM Carrier flame sensor assembly (part number LH33WZ005), the factory-specified replacement for the Carrier PY1PNA042080ACBA packaged unit. The flame sensor — also called a flame rod — monitors the burner to confirm ignition has occurred. It passes a small electrical current through the burner flame; if it cannot detect the flame within a few seconds, the control board cuts off gas flow as a safety measure. A failed or contaminated flame sensor is one of the most common reasons a furnace or packaged unit will light briefly and then shut off, typically within 5–8 seconds, leading to a no-heat lockout condition.

• Specs: OEM Carrier flame sensor assembly | Part# LH33WZ005 | 64½" wire lead | Factory Authorized Part | Genuine Carrier Corporation component
• OEM vs Generic: This OEM sensor is manufactured to exact Carrier factory tolerances for microamp signal output and rod geometry. Aftermarket sensors can produce inconsistent readings, causing nuisance shutdowns or false lockouts — especially in colder weather when reliable ignition detection is critical.
• Install difficulty: 2/5 — Turn off power and gas before servicing. Tools needed: ¼" hex driver or 5/16" nut driver, needle-nose pliers, and optionally a multimeter to confirm microamp output (typically 1–4 µA). Lightly sand the sensor rod with fine steel wool if replacing due to oxidation buildup. Always confirm polarity of the wire connector before reconnecting.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Engineered for the Carrier PY1PNA042080ACBA packaged unit. Verify your existing part number against LH33WZ005 on your unit's wiring diagram or data plate before ordering. Our HVAC parts specialists are available to confirm fitment — reach out before you buy if you have any questions.