OEM Carrier Spark Electrode Ignitor Assembly 48VL400002 for Model PY4GEAA42090AA

This OEM spark electrode ignitor assembly is the factory-specified replacement for the Carrier PY4GEAA42090AA packaged gas unit. The ignitor generates a high-voltage spark to light the burners at the start of every heat cycle. When it fails or degrades, the control board will attempt ignition, detect no flame, and lock out the system — leaving you with a no-heat call and a flashing fault code. Replacing the ignitor is one of the most common and straightforward furnace repairs, and using the correct OEM part ensures proper spark gap, electrode geometry, and cable integrity.

• OEM Part Numbers: 48VL400002 (original) | Superseded by 50HJ403022 — both are genuine Carrier Factory Authorized Parts shipped as the current production version
• OEM vs Generic: OEM electrodes maintain exact spark gap tolerances and use factory-spec high-voltage cable insulation. Generic igniters may produce inconsistent sparks, leading to repeated lockouts, nuisance service calls, and accelerated control board wear.
• Install Difficulty: 2/5 — Shut off gas and power before starting. Tools needed: 1/4" nut driver, flathead screwdriver, needle-nose pliers. Photograph all wiring connections before disconnecting. The electrode mounts to the burner bracket — remove two screws, unplug the harness, swap, and re-gap if needed. No soldering required.
• Warranty: 1-year OEM manufacturer warranty against defects. Ships same business day from our warehouse when ordered before 3 PM local time.

Compatibility: Designed for the Carrier PY4GEAA42090AA packaged gas/electric unit. This part is also used across select Carrier, Bryant, and Payne packaged rooftop and split-system models — always verify against your unit's data plate and wiring diagram before ordering. Need fitment confirmation? Our HVAC parts specialists verify compatibility before you buy. Order now — in stock and ships today.