OEM Carrier Spark Electrode Ignitor 48VL400002 / 50HJ403022 for Model PY4GPAA36090AA

This is the factory OEM spark electrode ignitor assembly for the Carrier PY4GPAA36090AA packaged gas/electric unit. The spark electrode generates the high-voltage arc that ignites the gas burner on each heating call. When this component fails or becomes fouled with carbon deposits, the control board will attempt ignition, detect no flame, and enter a safety lockout — leaving you with a system that clicks repeatedly but never fires, or one that shuts down with a no-heat fault code. Replacing the ignitor with the correct OEM assembly restores factory-spec spark gap, arc intensity, and electrode position for reliable, safe ignition every time.

• OEM Part Numbers: 48VL400002 (original) | 50HJ403022 (current Carrier OEM supersession — direct drop-in replacement) | Also supersedes 50HJ401430 and 50HJ400608
• OEM vs Generic: OEM electrodes are manufactured to Carrier's exact ceramic insulator grade, spark gap, and bracket geometry. Aftermarket spark electrodes frequently use inferior ceramics that crack under thermal cycling, shifting the spark gap and causing intermittent ignition failures within one to two seasons.
• Install difficulty: 2/5 — Shut off gas supply and 24V control power before beginning. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers. Disconnect the ignition wire and ground lead, remove the mounting bracket screws, swap the electrode, and re-gap if required per unit wiring diagram. Always verify ceramic insulator integrity before reinstalling.
• Warranty: 1-year OEM manufacturer warranty against defects. Ships same business day from our warehouse.

Compatibility: Engineered for Carrier model PY4GPAA36090AA packaged gas/electric rooftop units. Note that OEM part number 48VL400002 has been superseded by Carrier part 50HJ403022 — both part numbers are fulfilled with the current production assembly. Verify your existing electrode style and bracket configuration against your unit's wiring diagram before ordering. Our fitment team is available to confirm compatibility before you buy.