OEM Carrier Spark Electrode Ignitor 48VL400002 for Model PY4GEAB36090AA

This is the factory-specified OEM spark electrode ignitor for the Carrier PY4GEAB36090AA packaged gas/electric unit. The spark electrode ignitor generates the high-voltage spark that ignites the gas burner at the start of each heat cycle. When this component fails or becomes fouled, the control board will detect an ignition failure, lock out the system, and flash a diagnostic fault code — leaving your unit blowing cold air or cycling without producing heat. Replacing this ignitor with the correct OEM part restores proper spark timing and reliable ignition sequence performance.

• OEM Part Number: 48VL400002 (superseded by Carrier P/N 50HJ403022 — functionally identical direct replacement supplied)
• OEM vs Generic: Factory Authorized Parts are manufactured to exact Carrier electrode gap, tip geometry, and wire harness specifications. Off-brand electrodes can cause misfires, nuisance lockouts, and accelerated control board wear from repeated failed ignition attempts.
• Install Difficulty: 3/5 — Shut off gas supply and 24V power before beginning. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, and a multimeter to verify 24VAC at the ignitor circuit. Photograph wiring connections before disconnecting. Fragile ceramic tip — handle by the wire harness only.
• Warranty: 1-year OEM factory warranty against manufacturing defects. Ships same business day from our warehouse when ordered before cut-off.

Compatibility: Designed for the Carrier PY4GEAB36090AA packaged rooftop/ground-mount gas electric unit. Note that OEM part 48VL400002 has been superseded by Carrier P/N 50HJ403022 — the updated part number is the current factory-authorized direct replacement. Always verify your unit's data plate and wiring diagram before ordering. Have a question about fitment? Our HVAC parts team confirms compatibility before you buy — in stock and ships today.