OEM Carrier Spark Electrode Ignitor 48VL400002 for Model PY3GNA042090NB

This is the factory OEM spark electrode ignitor for the Carrier PY3GNA042090NB packaged gas unit, supplied under OEM part numbers 48VL400002 and 48GS400168. The current superseding part number is 50HJ403022 — all are fully cross-compatible and factory-authorized. The spark electrode ignitor generates the precisely timed high-voltage spark that ignites the gas burner on each heating cycle. When this component fails or becomes fouled, the control board will attempt ignition, fail to prove flame, and lock out the unit — leaving you with a system that runs the inducer but delivers no heat. This is one of the most common no-heat diagnoses on Carrier packaged rooftop and gas-electric units.

• OEM Part Numbers: 48VL400002 | 48GS400168 | Superseded by 50HJ403022 — all factory-authorized designations for this ignitor assembly.
• OEM vs Generic: OEM spark electrodes are manufactured to exact gap spacing and ceramic insulator ratings specified by Carrier engineering. Off-brand electrodes often have inconsistent gap tolerances, leading to misfires, repeated lockouts, and premature control board stress.
• Install Difficulty: 2/5 — Disconnect power and gas before servicing. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers. Photograph existing wire routing before disconnecting. Handle ceramic insulator with care — do not touch the electrode tip with bare hands.
• Warranty: 1-year OEM factory warranty against manufacturing defects. Ships same business day from our warehouse in original factory packaging.

Compatibility: Direct OEM replacement for Carrier model PY3GNA042090NB. Also cross-references to additional Carrier, Bryant, and Payne packaged gas and rooftop units using the same ignitor assembly — verify your unit's data plate and existing part number before ordering. Our parts specialists are available to confirm fitment. Order by 3 PM and ships today.