OEM Carrier 90° Flame Sensor (48GS400192) for Model PY1PNB036090NBAA

This is the genuine OEM Carrier flame sensor (part #48GS400192) factory-specified for the Carrier PY1PNB036090NBAA gas furnace. The flame sensor — also called a flame rod — uses ionization/rectification technology to detect the presence of an active burner flame during each heating cycle. When the sensor is fouled with oxidation or has failed entirely, the furnace control board loses confirmation that ignition occurred, triggering a safety lockout. The classic symptom: your furnace lights, runs for 5–8 seconds, then shuts off — repeating 3 times before locking out completely.

• Part Specs: 90-degree rod angle | Includes factory mounting bracket | OEM part #48GS400192 | Compact form factor (~4.9" × 1.75" × 1.6")
• OEM vs Generic: This is a genuine Carrier OEM sensor — not a universal substitute. OEM sensors are factory-matched to your control board's microamp detection threshold, ensuring reliable flame signal and fewer nuisance lockouts compared to generic alternatives.
• Install Difficulty: 2/5 — Turn off gas and power before servicing. Tools needed: 1/4" or 5/16" nut driver, lightly abrasive fine steel wool or emery cloth (to clean rod if reusing), multimeter (optional, to verify microamp signal). Disconnect the single wire connector, remove the mounting screw, swap the sensor, and torque snug — do not overtighten.
• Warranty: 1-year OEM manufacturer warranty against defects. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Designed for the Carrier PY1PNB036090NBAA gas furnace. Verify your existing sensor's mounting angle (90°) and bracket style against your unit's data plate before ordering. If you're unsure of fitment, our HVAC parts specialists are available to confirm compatibility before you buy. Order now — in stock and ships today.