OEM Carrier Spark Electrode Ignitor Assembly 48GS400168 for Model PY1PNB042090AAAA

This OEM spark electrode ignitor assembly (part number 48GS400168) is the factory-specified replacement for the Carrier PY1PNB042090AAAA packaged gas/electric unit. The ignitor's dual-rod electrode assembly generates the high-voltage spark that ignites the gas burner on each call for heat. When the ignitor fails or becomes fouled, the control board will attempt ignition, fail to sense a flame, and lock the system out — leaving you with a blinking fault code and no heat. Replacing the ignitor assembly is one of the most common and cost-effective furnace repairs available.

• Part Type: Spark Electrode Ignitor Assembly | 2-Rod design | OEM part number 48GS400168 | Factory-matched fit and geometry
• OEM vs Generic: This is a genuine Carrier OEM assembly, crafted to exact factory specifications for electrode gap, rod length, and ceramic insulator rating — ensuring reliable spark and long service life. Generic igniters often have inconsistent electrode gaps that cause nuisance lockouts.
• Install Difficulty: 2/5 — Shut off gas and 24V/line-voltage power before beginning. Tools needed: 1/4" nut driver, needle-nose pliers, and a multimeter for post-install verification. Disconnect the high-voltage ignitor lead carefully to avoid cracking the ceramic insulator. Photograph existing wiring and electrode positioning before removal.
• Warranty: 1-year OEM factory warranty against defects. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Designed for the Carrier PY1PNB042090AAAA packaged rooftop/gas-electric unit. Always verify your existing part number on the ignitor body or unit wiring diagram before ordering. If you have any fitment questions, our HVAC parts specialists are available to confirm compatibility before you purchase — no guesswork required.