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This OEM spark electrode ignitor assembly (part# 48GS400168) is the factory-specified replacement ignitor for the Carrier PY3PNA042060AB packaged gas unit. The ignitor generates the spark that ignites the gas burners during each call for heat. When this component fails or degrades, the furnace or packaged unit will attempt ignition, fail to light, and go into a safety lockout — leaving you with no heat. Common symptoms include the system cycling on and off repeatedly, a blinking fault code on the control board, or a complete no-heat condition.
Compatibility: Engineered as a direct OEM fit for the Carrier PY3PNA042060AB packaged gas/electric unit. Always verify your model and serial number against your unit's data plate before ordering. Our fitment team is available to confirm compatibility before you buy — no guesswork required.