OEM Carrier Spark Electrode Ignitor 48VL400002 for Model PY4GEAB48090AA

This is the factory OEM spark electrode ignitor assembly for the Carrier PY4GEAB48090AA packaged rooftop unit. The spark electrode ignitor generates the high-voltage arc that ignites the gas burner at the start of every heat cycle. When this component fails or degrades, the unit will attempt ignition, fail to establish a flame, and enter a lockout condition — leaving your space without heat. Common symptoms include repeated ignition attempts with no burner light-off, a visible cracked or fouled electrode tip, or fault codes indicating ignition failure on the control board.

• OEM Part Number: 48VL400002 (Superseded by 50HJ403022) | Factory Authorized Parts — direct Carrier replacement
• OEM vs Generic: This OEM ignitor assembly is manufactured to exact Carrier tolerances for spark gap, electrode material, and bracket geometry. Aftermarket igniters frequently use inferior alloys that erode faster, causing nuisance lockouts and premature failure within a single heating season.
• Install Difficulty: 3/5 — Requires disconnection of high-voltage ignition wire and removal of the burner compartment panel. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, and a multimeter to verify spark output. Always shut off gas supply and disconnect power before servicing. Photograph all wire routing before removal.
• Warranty: 1-year OEM factory warranty against manufacturing defects. In-stock units ship same business day from our warehouse.

Compatibility: Engineered for the Carrier PY4GEAB48090AA packaged rooftop gas/electric unit. Note that OEM part number 48VL400002 has been superseded by Carrier P/N 50HJ403022 — both numbers are cross-referenced and ship as the current production assembly. Verify electrode configuration and wire harness connector against your unit's data plate before ordering. Our team is available to confirm fitment before you buy — no guesswork, no returns.