OEM Carrier Flame Sensor LH33WZ003 for Model PY1PPA042080ACBA

This OEM flame sensor (part number LH33WZ003) is the factory-specified replacement for the Carrier PY1PPA042080ACBA packaged gas/electric unit. The flame sensor — also called a flame rod — is a critical safety component that detects the presence of a burner flame by passing a small micro-amp current through the flame to ground. When the sensor becomes coated with oxidation or carbon buildup, it can no longer confirm flame presence, causing the control board to cut gas flow within 5 to 8 seconds of each ignition attempt. The result is a furnace that lights briefly, then shuts off repeatedly in a lockout cycle — leaving your home without heat.

• Specs: OEM part number LH33WZ003 | Factory flame rod assembly | Carrier-matched micro-amp signal output | Exact bracket geometry and rod angle for drop-in fit
• OEM vs Generic: This is the genuine Carrier OEM sensor — not a universal aftermarket rod. OEM units deliver precise micro-amp readings within the control board's acceptance window, reducing nuisance lockouts common with undersized generic sensors.
• Install Difficulty: 2/5 — Turn off power and gas before beginning. Tools needed: 1/4" or 5/16" nut driver, light sandpaper or fine steel wool (to clean rod if reusing), multimeter (to verify micro-amp draw post-install). Disconnect the single wire connector, remove the mounting screw, swap the sensor, and reconnect. A full system test cycle is recommended after installation.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before 3 PM local time.

Compatibility: Engineered as a direct OEM replacement for Carrier model PY1PPA042080ACBA. Always cross-reference the part number on your existing flame sensor or the unit's wiring diagram before ordering. If you need fitment confirmation, our HVAC parts specialists are available to verify compatibility before you buy — no guesswork required.