OEM Carrier Flame Sensor 50HJ401431 for Model PY1REA048074AAWA

This is the genuine OEM Carrier flame sensor (part #50HJ401431) factory-specified for the Carrier PY1REA048074AAWA packaged gas heating unit. The flame sensor is a critical safety component: its stainless steel rod sits in the burner flame and uses microamp current rectification to confirm combustion is present. When the sensor fails — typically due to oxidation or carbon buildup on the probe — the control board cannot verify the flame, causing the unit to ignite briefly and then shut off after just 5–8 seconds, triggering a lockout. If your Carrier packaged unit lights and then immediately shuts off in a repetitive cycle, a failed flame sensor is the most common culprit.

• Specs: OEM Part #50HJ401431 | Stainless steel sensing rod | Alumina-coated probe | Dimensions: approx. 2.9" W × 4" D × 1.75" H | Compatible with standard 24V AC control circuits
• OEM vs Generic: This OEM part is manufactured to exact Carrier factory tolerances for microamp sensitivity and probe geometry. Generic sensors may have slightly off-spec rod lengths or coatings, leading to nuisance shutdowns or premature re-failure.
• Install Difficulty: 2/5 — Shut off gas and power at the unit before beginning. Tools needed: 1/4" hex driver, needle-nose pliers, and a multimeter (to verify microamp draw on the new sensor). Always confirm the burner and heat exchanger area are clear before restoring power.
• Warranty: 1-year OEM factory warranty. In-stock orders ship same business day from our warehouse when placed before cutoff.

Compatibility: Designed as a direct OEM replacement for the Carrier PY1REA048074AAWA packaged gas/electric unit. Verify part number against your unit's service data label before ordering. Have questions about fitment? Our HVAC parts specialists confirm compatibility before you buy — contact us today and we'll get your system back up fast.