OEM Carrier Spark Electrode Ignitor Assembly 48VL400002 for Model PY4GPAB42090AA

This is the factory OEM spark electrode ignitor assembly for the Carrier PY4GPAB42090AA packaged gas/electric unit. The ignitor is a critical combustion component — it generates the high-voltage spark that ignites the gas burner on every heating call. When this part fails, the unit will attempt ignition, fail to establish flame, and enter a safety lockout, leaving you with no heat. Symptoms include a system that clicks but won't light, repeated ignition attempts followed by fault codes, or a furnace that runs the inducer but never fires the burner.

• OEM Part Number: 48VL400002 (superseded by 50HJ403022) | Factory Authorized Carrier replacement | Spark electrode ignitor assembly with mounting bracket
• OEM vs Generic: This factory-authorized OEM ignitor is precision-matched to the electrode gap, ceramic insulator rating, and spark timing specifications of the PY4GPAB42090AA. Generic igniters often have inconsistent electrode gaps or lower-grade ceramic bodies that crack under thermal cycling, causing repeat failures.
• Install Difficulty: 2/5 — Shut off gas and power at the disconnect before beginning. Tools needed: 1/4" and 5/16" nut driver, needle-nose pliers. Locate the ignitor on the burner assembly, disconnect the wire harness connector, remove the mounting screws, and reverse to install. Do not touch the ceramic electrode body with bare hands — skin oils cause premature cracking.
• Warranty: 1-year OEM manufacturer warranty against defects. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Designed for the Carrier PY4GPAB42090AA packaged gas/electric system. Note: OEM part 48VL400002 has been superseded by Carrier part number 50HJ403022 — both are stocked and either will restore proper ignition function. Confirm your unit's gas valve type and burner configuration against your data plate before ordering. Our fitment team is available to verify compatibility before you buy.