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This is the genuine OEM Carrier spark electrode ignitor assembly (part number 48GS400168), factory-specified for the Carrier PY3PPA048090AA packaged gas unit. The spark electrode ignitor generates the high-voltage arc that ignites the gas burner on every heating call. When this part fails, the control board will attempt ignition, find no flame, and lock the unit out — leaving you with a blinking fault code, no heat, and a frustrating service call. Replacing the ignitor assembly is one of the most common and cost-effective repairs on Carrier 48GS-series gas packaged units.
Compatibility: Designed for the Carrier PY3PPA048090AA packaged gas/electric unit (4-ton, 90,000 BTU) using the 48GS-series spark electrode ignition system. Always verify your existing ignitor part number against 48GS400168 before ordering. Our parts specialists are available to confirm fitment at no charge — just reach out before placing your order. In stock and ships today.