OEM Carrier Flame Sensor 50HJ401431 for Model PY1REA072074ACWA

This is the genuine OEM flame sensor for the Carrier PY1REA072074ACWA packaged rooftop unit. The flame sensor — also called a flame rod — monitors the burner during every heating cycle by passing a small microamp current through the flame to the burner ground. If your unit lights briefly and then shuts down within 5 to 8 seconds, a failed or contaminated flame sensor is the most common cause. Carbon buildup on the stainless steel probe insulates it from the flame, causing the control board to cut gas flow as a safety lockout.

• Specs: OEM Part No. 50HJ401431 | Stainless steel sensing probe | Alumina-coated, corrosion-resistant construction | Dimensions: 2.9 in W × 4 in D × 1.75 in H | Weight: 0.09 lbs | Compatible with 24V AC control circuits
• OEM vs Generic: This factory-matched OEM sensor meets Carrier's exact microamp threshold specifications. Generic sensors can have off-spec probe geometry or coating, leading to nuisance lockouts or reduced safety margin — always use OEM on commercial packaged units.
• Install Difficulty: 2/5 — Shut off gas and power before servicing. Tools needed: 1/4" nut driver, fine steel wool or emery cloth (for probe cleaning if reusing), multimeter set to microamps. Confirm microamp reading is within the control board's required range after installation.
• Warranty: 1-year OEM manufacturer warranty. In-stock units ship same business day when ordered by 3 PM local time.

Compatibility: Engineered as the direct factory replacement for Carrier model PY1REA072074ACWA. Verify OEM part number 50HJ401431 against your unit's service data plate before ordering. Our HVAC parts specialists are available to confirm fitment — contact us before you order if you have any questions.