OEM Carrier Flame Sensor Assembly LH33WZ005 for Model PY1PPA036120ACBA

This OEM Carrier flame sensor assembly (part# LH33WZ005) is the factory-specified replacement for the Carrier PY1PPA036120ACBA packaged heating and cooling unit. The flame sensor—also called a flame rod—uses micro-amperage electrical conductivity through the burner flame to prove ignition to the control board. When the sensor is coated with oxidation or carbon buildup, or the rod itself has failed, the control board can no longer verify that a flame is present and will cut off gas flow as a safety measure. The result is a frustrating cycle: the unit lights, runs for 5 to 8 seconds, then shuts off on lockout—leaving you with no heat.

• Part Number: LH33WZ005 | Factory Authorized Parts (FAP) | Carrier OEM | Includes 64.5" lead wire harness for direct plug-in replacement
• OEM vs Generic: The OEM rod is manufactured to Carrier's exact conductivity and geometry tolerances. Aftermarket sensors frequently have slightly different rod angles or inferior alloy coatings, causing nuisance lockouts or shortened service life in high-cycle applications.
• Install Difficulty: 2/5 — Shut off gas and power at the disconnect before servicing. Locate the flame sensor rod adjacent to the burner assembly. Disconnect the lead wire, remove the single mounting screw, and swap in the new sensor. Tools needed: 1/4" or 5/16" nut driver, needle-nose pliers. Verify microamp signal (1.5–4 µA typical) with a multimeter after installation.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before 3 PM local time.

Compatibility: Engineered specifically for the Carrier PY1PPA036120ACBA packaged unit. This part also cross-references within the Carrier Factory Authorized Parts (FAP) program. Confirm your model and serial number on the unit data plate before ordering. Our HVAC parts specialists are available to verify fitment — reach out before you buy for total peace of mind. In stock. Ships today.