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The OEM Carrier LH33ZS003 hot surface igniter heats to over 2,000°F to light the gas burners in your GB3AAV048090AAJA furnace at the start of every heating cycle. Made of durable silicon nitride, this genuine Carrier igniter is engineered to the precise resistance and ruggedness standards of the GB3AAV048090AAJA, delivering fast, reliable ignition while resisting the thermal cracking that causes generic igniters to fail early. If your furnace clicks but won't light, short cycles, or produces no heat, a worn igniter is the most likely culprit. Replacement is a beginner-friendly repair: cut power, unplug the connector, remove one or two mounting screws, and install the new igniter in about 20 minutes—just handle it only by the ceramic base to avoid contaminating the element. Orders placed before 3PM CST ship same-day so you can get warm again tonight. Rely on this factory-authorized Carrier part for an exact fit and long-lasting, consistent ignition performance.
This part is compatible with Carrier model GB3AAV048090AAJA.
Same-day shipping before 3 PM CST. 30-day returns on uninstalled parts.