OEM Carrier Spark Electrode Ignitor (48GS400168) for Model PY3PPA042090NB

This is the factory-specified OEM spark electrode ignitor assembly for the Carrier PY3PPA042090NB packaged gas/electric unit. The ignitor is the first critical link in the heating sequence — when the control board calls for heat, it energizes the ignitor to ignite the gas burners. A failed ignitor is one of the most common causes of a no-heat call: the unit will attempt ignition, fail to sense a flame, and lock out after 1–3 trials. Replacing the ignitor with the correct OEM assembly restores reliable ignition and eliminates nuisance lockouts.

• Part Number: 48GS400168 | OEM Carrier Factory Authorized Part | Ignitor Assembly (2-Rod Spark Electrode configuration)
• OEM vs Generic: Factory OEM igniters are manufactured to exact electrode gap, ceramic insulator grade, and wire harness connector specifications. Generic substitutes frequently suffer premature cracking of the ceramic body or connector mis-fit, leading to repeat failures within one season.
• Install Difficulty: 2/5 — Straightforward swap on most packaged units. Tools needed: 1/4" or 5/16" nut driver, needle-nose pliers. Always shut off gas supply and disconnect power before servicing. Photograph existing wiring before disconnecting the harness connector.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier PY3PPA042090NB packaged gas/electric unit. Verify your existing part number on the ignitor body or equipment data plate before ordering. If you have any compatibility questions, our HVAC parts specialists are standing by to confirm fitment before you buy — order with confidence and get back to comfort fast.