OEM Carrier Spark Electrode Ignitor Assembly 48GS400168 for Model PY3PNA042090AA

This is the genuine OEM spark electrode ignitor assembly for the Carrier PY3PNA042090AA packaged gas/electric unit. The ignitor assembly generates the electrical spark that ignites the gas burner at the start of every heat cycle. When this component fails, the control board will attempt ignition, detect no flame, and lock out the system — leaving you with no heat and a fault code on the board. A failed or cracked electrode is one of the most common causes of furnace lockout in Carrier packaged units.

• Part Number: 48GS400168 | OEM Carrier Spark Electrode Ignitor Assembly | Factory Authorized Parts — exact drop-in replacement for the PY3PNA042090AA
• OEM vs Generic: This is a genuine Carrier factory part crafted to exact specifications, ensuring optimal performance and system longevity. Aftermarket igniters frequently use inferior ceramic or electrode materials that degrade faster under repeated thermal cycling, risking repeat failures within a single heating season.
• Install Difficulty: 2/5 — Shut off gas and power before beginning. Tools needed: 1/4" nut driver, flathead screwdriver, needle-nose pliers. Disconnect the ignitor harness, remove the mounting bracket screw, swap the electrode assembly, and reconnect. Always verify spark gap on reassembly per your unit's service manual.
• Warranty: 1-year OEM factory warranty on parts. Orders placed before 3 PM EST ship same business day from our warehouse.

Compatibility: Designed and factory-specified for the Carrier PY3PNA042090AA packaged heating and cooling unit. Verify your OEM part number on the unit's data plate or wiring diagram before ordering. Our HVAC parts specialists are available to confirm fitment — contact us before you order if you have any questions.