OEM Carrier Spark Electrode Ignitor for Model PY3GNA048115NB — Part #48GS400168

This OEM spark electrode ignitor assembly is the factory-specified replacement for the Carrier PY3GNA048115NB packaged rooftop unit. The spark electrode generates the high-voltage arc that ignites the burner during each heating cycle. When this component fails or degrades, the control board will attempt ignition, detect no flame, and enter a safety lockout — leaving your system with no heat and a fault code. Common symptoms include repeated ignition attempts followed by lockout, intermittent heating, or a unit that simply fails to fire on call for heat.

• Part Numbers: OEM Part # 48GS400168 (active) | Supersedes discontinued Part # 48VL400002 — direct factory replacement, no modifications required.
• OEM vs Generic: OEM Carrier electrode assemblies are manufactured to exact gap spacing and ceramic insulator specifications. Off-brand electrodes often have inconsistent arc gaps, leading to weak or intermittent ignition and premature control board wear.
• Install Difficulty: 2/5 — Shut off gas supply and disconnect power before beginning. Tools needed: 1/4" and 5/16" nut driver, needle-nose pliers. Photograph or label wiring harness connections before removal. The electrode assembly typically mounts with 2 screws to the burner deck and unplugs from the ignition wire harness.
• Warranty: 1-year OEM manufacturer warranty against defects. Ships same business day from our warehouse when ordered by cutoff time.

Compatibility: Fits Carrier model PY3GNA048115NB packaged gas/electric rooftop unit. This part directly supersedes discontinued OEM part number 48VL400002 — no adapter or modification required. Always verify your unit's data plate model number and cross-reference both part numbers before ordering. Our fitment team is available to confirm compatibility prior to purchase.