OEM Carrier Flame Sensor 48GS400192 for Packaged Unit PY2PPB030040AA

This is the genuine OEM flame sensor (flame rod) for the Carrier PY2PPB030040AA packaged gas/electric unit. The flame sensor is a critical safety component in the burner assembly — it detects the presence of a burner flame by passing a small electrical current through the flame itself. If the control board doesn't receive confirmation of a live flame within a few seconds of ignition, it immediately cuts gas flow as a safety measure. A failed or fouled flame sensor is one of the most common causes of a system that appears to light, then shuts off after just 5 to 8 seconds, triggering a lockout fault code.

• OEM Part Number: 48GS400192 | Genuine Carrier factory replacement | Direct drop-in fit for model PY2PPB030040AA — no modifications required
• OEM vs Generic: The OEM flame rod uses factory-spec stainless steel rod alloy and ceramic insulator rated for the exact microamp signal range your control board expects. Aftermarket sensors often read outside the tolerance window, causing nuisance lockouts even after installation.
• Install Difficulty: 2/5 — Shut off gas and 24V power before starting. Tools needed: 1/4" nut driver, flat-head screwdriver, multimeter (to verify microamp signal 1–10 µA). Lightly sand the rod with fine steel wool if the original sensor is fouled before condemning it. Always verify lockout fault codes are cleared after replacement.
• Warranty: 1-year OEM factory warranty against defects. In-stock and ships same business day from our warehouse.

Compatibility: Designed specifically for the Carrier PY2PPB030040AA packaged gas/electric unit (2.5 ton, 40 MBH heat). Always cross-reference OEM part number 48GS400192 against your unit's wiring diagram or data plate to confirm fitment before installation. Have a question about compatibility? Our HVAC parts specialists verify fitment before you order — contact us anytime.